diff --git a/astro.config.mjs b/astro.config.mjs
index 2ddbd66..e8537ad 100644
--- a/astro.config.mjs
+++ b/astro.config.mjs
@@ -1,11 +1,13 @@
-// @ts-check
 import { defineConfig } from 'astro/config';
-
 import tailwind from '@astrojs/tailwind';
-
 import react from '@astrojs/react';
+import node from '@astrojs/node';
 
 // https://astro.build/config
 export default defineConfig({
+  output: 'server',
+  adapter: node({
+    mode: 'standalone'
+  }),
   integrations: [tailwind(), react()]
 });
\ No newline at end of file
diff --git a/docker-compose.yml b/docker-compose.yml
index 8b63bbc..aa26198 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -6,4 +6,11 @@ services:
     container_name: websitedummy_app
     restart: always
     ports:
-      - "8080:8080"
+      - "8080:4321"
+    environment:
+      - HOST=0.0.0.0
+      - PORT=4321
+      - DATA_DIR=/app/data
+    volumes:
+      - ./app/data:/app/data
+
diff --git a/package-lock.json b/package-lock.json
index dd8b499..ab5c0ce 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,6 +8,7 @@
       "name": "websitedummy",
       "version": "0.0.1",
       "dependencies": {
+        "@astrojs/node": "^8.3.4",
         "@astrojs/react": "^3.6.3",
         "@astrojs/tailwind": "^5.1.4",
         "@fontsource/inter": "^5.2.8",
@@ -15,11 +16,17 @@
         "@types/react": "^19.2.17",
         "@types/react-dom": "^19.2.3",
         "astro": "^4.16.0",
+        "nodemailer": "^9.0.5",
         "react": "^19.2.7",
         "react-dom": "^19.2.7",
         "react-icons": "^5.7.0",
         "tailwindcss": "^3.4.19"
       },
+      "devDependencies": {
+        "@types/nodemailer": "^8.0.1",
+        "@vitest/coverage-v8": "^4.1.10",
+        "vitest": "^4.1.10"
+      },
       "engines": {
         "node": ">=18.14.1"
       }
@@ -177,6 +184,19 @@
         "@types/hast": "^3.0.4"
       }
     },
+    "node_modules/@astrojs/node": {
+      "version": "8.3.4",
+      "resolved": "https://registry.npmjs.org/@astrojs/node/-/node-8.3.4.tgz",
+      "integrity": "sha512-xzQs39goN7xh9np9rypGmbgZj3AmmjNxEMj9ZWz5aBERlqqFF3n8A/w/uaJeZ/bkHS60l1BXVS0tgsQt9MFqBA==",
+      "license": "MIT",
+      "dependencies": {
+        "send": "^0.19.0",
+        "server-destroy": "^1.0.1"
+      },
+      "peerDependencies": {
+        "astro": "^4.2.0"
+      }
+    },
     "node_modules/@astrojs/prism": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/@astrojs/prism/-/prism-3.1.0.tgz",
@@ -551,6 +571,16 @@
         "node": ">=6.9.0"
       }
     },
+    "node_modules/@bcoe/v8-coverage": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/@bcoe/v8-coverage/-/v8-coverage-1.0.2.tgz",
+      "integrity": "sha512-6zABk/ECA/QYSCQ1NGiVwwbQerUCZ+TQbp64Q3AgmfNvurHH0j8TtXa1qbShXA6qqkpAj4V5W8pP6mLe1mcMqA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@emnapi/runtime": {
       "version": "1.11.1",
       "resolved": "https://registry.npmjs.org/@emnapi/runtime/-/runtime-1.11.1.tgz",
@@ -1042,6 +1072,254 @@
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       "license": "MIT"
     },
+    "node_modules/@oxc-project/types": {
+      "version": "0.143.0",
+      "resolved": "https://registry.npmjs.org/@oxc-project/types/-/types-0.143.0.tgz",
+      "integrity": "sha512-u6JZdLBTLotrNC9Vd6vPssINdzcCzleKAH6EJKImQb7GtYvX5keN2dxkoK44stCc4tffE6QQRtZTXVSzsLUlWA==",
+      "dev": true,
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/Boshen"
+      }
+    },
+    "node_modules/@rolldown/binding-android-arm64": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-android-arm64/-/binding-android-arm64-1.2.3.tgz",
+      "integrity": "sha512-zrJtHDcaZJ1Fp7xf4hNl+7seH9Cn/N5TwLYkhgXREtBwAd/jaqW3uqeHxpDugJLVICWg4eW44kOQEGJ1r6jCGw==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-darwin-arm64": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-darwin-arm64/-/binding-darwin-arm64-1.2.3.tgz",
+      "integrity": "sha512-ieIiibVCp0tX7TLu2cafoNPv8wJyYi01ekXpbf8q2j7F4rGAhhXb/eQh7ge9DRBY78GwmRQtvjZDux7EDbA8kA==",
+      "cpu": [
+        "arm64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-darwin-x64": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-darwin-x64/-/binding-darwin-x64-1.2.3.tgz",
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+      "resolved": "https://registry.npmjs.org/@rolldown/binding-freebsd-x64/-/binding-freebsd-x64-1.2.3.tgz",
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+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-arm-gnueabihf/-/binding-linux-arm-gnueabihf-1.2.3.tgz",
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+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-arm64-gnu/-/binding-linux-arm64-gnu-1.2.3.tgz",
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+      "resolved": "https://registry.npmjs.org/@rolldown/binding-linux-x64-musl/-/binding-linux-x64-musl-1.2.3.tgz",
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+      "resolved": "https://registry.npmjs.org/@rolldown/binding-openharmony-arm64/-/binding-openharmony-arm64-1.2.3.tgz",
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+      "resolved": "https://registry.npmjs.org/@rolldown/binding-win32-arm64-msvc/-/binding-win32-arm64-msvc-1.2.3.tgz",
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+      "cpu": [
+        "arm64"
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+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
+    "node_modules/@rolldown/binding-win32-x64-msvc": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/@rolldown/binding-win32-x64-msvc/-/binding-win32-x64-msvc-1.2.3.tgz",
+      "integrity": "sha512-ekcqMMkI2PlhYnfzQnB/cEdYUVVJViWvoUyLrbzgDoi3Snfc1mVBwdnc306ufA5ejy8JSPjT2RlW1nQSjW7efg==",
+      "cpu": [
+        "x64"
+      ],
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      }
+    },
     "node_modules/@rolldown/pluginutils": {
       "version": "1.0.0-beta.27",
       "resolved": "https://registry.npmjs.org/@rolldown/pluginutils/-/pluginutils-1.0.0-beta.27.tgz",
@@ -1394,6 +1672,13 @@
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       "license": "MIT"
     },
+    "node_modules/@standard-schema/spec": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@standard-schema/spec/-/spec-1.1.0.tgz",
+      "integrity": "sha512-l2aFy5jALhniG5HgqrD6jXLi/rUWrKvqN/qJx6yoJsgKhblVd+iqqU4RCXavm/jPityDo5TCvKMnpjKnOriy0w==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/babel__core": {
       "version": "7.20.5",
       "resolved": "https://registry.npmjs.org/@types/babel__core/-/babel__core-7.20.5.tgz",
@@ -1435,6 +1720,17 @@
         "@babel/types": "^7.28.2"
       }
     },
+    "node_modules/@types/chai": {
+      "version": "5.2.3",
+      "resolved": "https://registry.npmjs.org/@types/chai/-/chai-5.2.3.tgz",
+      "integrity": "sha512-Mw558oeA9fFbv65/y4mHtXDs9bPnFMZAL/jxdPFUpOHHIXX91mcgEHbS5Lahr+pwZFR8A7GQleRWeI6cGFC2UA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/deep-eql": "*",
+        "assertion-error": "^2.0.1"
+      }
+    },
     "node_modules/@types/cookie": {
       "version": "0.6.0",
       "resolved": "https://registry.npmjs.org/@types/cookie/-/cookie-0.6.0.tgz",
@@ -1450,6 +1746,13 @@
         "@types/ms": "*"
       }
     },
+    "node_modules/@types/deep-eql": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/@types/deep-eql/-/deep-eql-4.0.2.tgz",
+      "integrity": "sha512-c9h9dVVMigMPc4bwTvC5dxqtqJZwQPePsWjPlpSOnojbor6pGqdk541lfA7AqFQr5pB1BRdq0juY9db81BwyFw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/estree": {
       "version": "1.0.9",
       "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.9.tgz",
@@ -1489,6 +1792,26 @@
         "@types/unist": "*"
       }
     },
+    "node_modules/@types/node": {
+      "version": "26.2.0",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-26.2.0.tgz",
+      "integrity": "sha512-5IviulTZeRNp2vAJ514cc/HUlY5nZ9fCbq9DMyC52BrhFZACo3nI0R7qBxhQmo/d27NFe96ur/b7Wwxklda+kg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "undici-types": "~8.3.0"
+      }
+    },
+    "node_modules/@types/nodemailer": {
+      "version": "8.0.1",
+      "resolved": "https://registry.npmjs.org/@types/nodemailer/-/nodemailer-8.0.1.tgz",
+      "integrity": "sha512-PxpaInm8V1JQDd4j0ds5HfvWQk8JupS1C0Picb96QJsrrRDjBH+DlK7L4ZdNSqNULhiZRQHc40nLVShaGxXAMw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
     "node_modules/@types/react": {
       "version": "19.2.17",
       "resolved": "https://registry.npmjs.org/@types/react/-/react-19.2.17.tgz",
@@ -1539,6 +1862,162 @@
         "vite": "^4.2.0 || ^5.0.0 || ^6.0.0 || ^7.0.0"
       }
     },
+    "node_modules/@vitest/coverage-v8": {
+      "version": "4.1.10",
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+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@bcoe/v8-coverage": "^1.0.2",
+        "@vitest/utils": "4.1.10",
+        "ast-v8-to-istanbul": "^1.0.0",
+        "istanbul-lib-coverage": "^3.2.2",
+        "istanbul-lib-report": "^3.0.1",
+        "istanbul-reports": "^3.2.0",
+        "magicast": "^0.5.2",
+        "obug": "^2.1.1",
+        "std-env": "^4.0.0-rc.1",
+        "tinyrainbow": "^3.1.0"
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+      "funding": {
+        "url": "https://opencollective.com/vitest"
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+      "peerDependencies": {
+        "@vitest/browser": "4.1.10",
+        "vitest": "4.1.10"
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+      "peerDependenciesMeta": {
+        "@vitest/browser": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@vitest/coverage-v8/node_modules/magicast": {
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+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@babel/parser": "^7.29.7",
+        "@babel/types": "^7.29.7",
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+        "@types/chai": "^5.2.2",
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+        "url": "https://opencollective.com/vitest"
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+    "node_modules/@vitest/mocker": {
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       "resolved": "https://registry.npmjs.org/sharp/-/sharp-0.33.5.tgz",
@@ -5636,6 +6748,13 @@
         "node": ">=10"
       }
     },
+    "node_modules/siginfo": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/siginfo/-/siginfo-2.0.0.tgz",
+      "integrity": "sha512-ybx0WO1/8bSBLEWXZvEd7gMW3Sn3JFlW3TvX1nREbDLRNQNaeNN8WK0meBwPdAaOI7TtRRRJn/Es1zhrrCHu7g==",
+      "dev": true,
+      "license": "ISC"
+    },
     "node_modules/signal-exit": {
       "version": "4.1.0",
       "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-4.1.0.tgz",
@@ -5689,6 +6808,29 @@
       "integrity": "sha512-D9cPgkvLlV3t3IzL0D0YLvGA9Ahk4PcvVwUbN0dSGr1aP0Nrt4AEnTUbuGvquEC0mA64Gqt1fzirlRs5ibXx8g==",
       "license": "BSD-3-Clause"
     },
+    "node_modules/stackback": {
+      "version": "0.0.2",
+      "resolved": "https://registry.npmjs.org/stackback/-/stackback-0.0.2.tgz",
+      "integrity": "sha512-1XMJE5fQo1jGH6Y/7ebnwPOBEkIEnT4QF32d5R1+VXdXveM0IBMJt8zfaxX1P3QhVwrYe+576+jkANtSS2mBbw==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/statuses": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.2.tgz",
+      "integrity": "sha512-DvEy55V3DB7uknRo+4iOGT5fP1slR8wQohVdknigZPMpMstaKJQWhwiYBACJE3Ul2pTnATihhBYnRhZQHGBiRw==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
+    "node_modules/std-env": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/std-env/-/std-env-4.2.0.tgz",
+      "integrity": "sha512-oCUKSupKTHX53EyjDtuZQ64pjLJ6yYCtpmEw0goYxtjG9KpbRe8KAsl2tBUGU9DyMcJ0RwJ8GqJAFzMXcXW1Rw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/stdin-discarder": {
       "version": "0.2.2",
       "resolved": "https://registry.npmjs.org/stdin-discarder/-/stdin-discarder-0.2.2.tgz",
@@ -5787,6 +6929,19 @@
         "node": ">=16 || 14 >=14.17"
       }
     },
+    "node_modules/supports-color": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
+      "integrity": "sha512-qpCAvRl9stuOHveKsn7HncJRvv501qIacKzQlO/+Lwxc9+0q2wLyv4Dfvt80/DPn2pqOBsJdDiogXGR9+OvwRw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "has-flag": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/supports-preserve-symlinks-flag": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/supports-preserve-symlinks-flag/-/supports-preserve-symlinks-flag-1.0.0.tgz",
@@ -5869,6 +7024,13 @@
         "node": ">=0.8"
       }
     },
+    "node_modules/tinybench": {
+      "version": "2.9.0",
+      "resolved": "https://registry.npmjs.org/tinybench/-/tinybench-2.9.0.tgz",
+      "integrity": "sha512-0+DUvqWMValLmha6lr4kD8iAMK1HzV0/aKnCtWb9v9641TnP/MFb7Pc2bxoxQjTXAErryXVgUOfv2YqNllqGeg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/tinyexec": {
       "version": "0.3.2",
       "resolved": "https://registry.npmjs.org/tinyexec/-/tinyexec-0.3.2.tgz",
@@ -5891,6 +7053,16 @@
         "url": "https://github.com/sponsors/SuperchupuDev"
       }
     },
+    "node_modules/tinyrainbow": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/tinyrainbow/-/tinyrainbow-3.1.1.tgz",
+      "integrity": "sha512-yau8yJdTt989Mm0Bd/236QnzEiPf2xLLTqUZRUJOo/3CB078LSwzei343DgtJVmfJKJE3TMINY1u42SQsP6mXw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
     "node_modules/to-regex-range": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/to-regex-range/-/to-regex-range-5.0.1.tgz",
@@ -5903,6 +7075,15 @@
         "node": ">=8.0"
       }
     },
+    "node_modules/toidentifier": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
+      "integrity": "sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.6"
+      }
+    },
     "node_modules/trim-lines": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/trim-lines/-/trim-lines-3.0.1.tgz",
@@ -5975,6 +7156,13 @@
       "integrity": "sha512-R9fBn90VTJrqqLDwyMph+HGne8eqY1iPfYhPzZrvKpIfwkWZbcYlfpsb8B9dTvBfpy1/hqAD7Wi8EKfP9e8zdw==",
       "license": "MIT"
     },
+    "node_modules/undici-types": {
+      "version": "8.3.0",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-8.3.0.tgz",
+      "integrity": "sha512-j375ScV60dom+YkPFIfTLcOiPxkN/buHz5GobjLhixFuANaNs3C9l4GmrWqejgXWJ7BbJcFYpTEUkS1Ge8bpZQ==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/unified": {
       "version": "11.0.5",
       "resolved": "https://registry.npmjs.org/unified/-/unified-11.0.5.tgz",
@@ -6663,6 +7851,191 @@
         }
       }
     },
+    "node_modules/vitest": {
+      "version": "4.1.10",
+      "resolved": "https://registry.npmjs.org/vitest/-/vitest-4.1.10.tgz",
+      "integrity": "sha512-R9jUTe5S4Qb0HCd4TNqpC7oGcrMssMRGXLW80ubjWsW9VH5GF8y1Y0SFLY9AbqSk6nt0PnOx4H4WNJYZ13GUPw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@vitest/expect": "4.1.10",
+        "@vitest/mocker": "4.1.10",
+        "@vitest/pretty-format": "4.1.10",
+        "@vitest/runner": "4.1.10",
+        "@vitest/snapshot": "4.1.10",
+        "@vitest/spy": "4.1.10",
+        "@vitest/utils": "4.1.10",
+        "es-module-lexer": "^2.0.0",
+        "expect-type": "^1.3.0",
+        "magic-string": "^0.30.21",
+        "obug": "^2.1.1",
+        "pathe": "^2.0.3",
+        "picomatch": "^4.0.3",
+        "std-env": "^4.0.0-rc.1",
+        "tinybench": "^2.9.0",
+        "tinyexec": "^1.0.2",
+        "tinyglobby": "^0.2.15",
+        "tinyrainbow": "^3.1.0",
+        "vite": "^6.0.0 || ^7.0.0 || ^8.0.0",
+        "why-is-node-running": "^2.3.0"
+      },
+      "bin": {
+        "vitest": "vitest.mjs"
+      },
+      "engines": {
+        "node": "^20.0.0 || ^22.0.0 || >=24.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      },
+      "peerDependencies": {
+        "@edge-runtime/vm": "*",
+        "@opentelemetry/api": "^1.9.0",
+        "@types/node": "^20.0.0 || ^22.0.0 || >=24.0.0",
+        "@vitest/browser-playwright": "4.1.10",
+        "@vitest/browser-preview": "4.1.10",
+        "@vitest/browser-webdriverio": "4.1.10",
+        "@vitest/coverage-istanbul": "4.1.10",
+        "@vitest/coverage-v8": "4.1.10",
+        "@vitest/ui": "4.1.10",
+        "happy-dom": "*",
+        "jsdom": "*",
+        "vite": "^6.0.0 || ^7.0.0 || ^8.0.0"
+      },
+      "peerDependenciesMeta": {
+        "@edge-runtime/vm": {
+          "optional": true
+        },
+        "@opentelemetry/api": {
+          "optional": true
+        },
+        "@types/node": {
+          "optional": true
+        },
+        "@vitest/browser-playwright": {
+          "optional": true
+        },
+        "@vitest/browser-preview": {
+          "optional": true
+        },
+        "@vitest/browser-webdriverio": {
+          "optional": true
+        },
+        "@vitest/coverage-istanbul": {
+          "optional": true
+        },
+        "@vitest/coverage-v8": {
+          "optional": true
+        },
+        "@vitest/ui": {
+          "optional": true
+        },
+        "happy-dom": {
+          "optional": true
+        },
+        "jsdom": {
+          "optional": true
+        },
+        "vite": {
+          "optional": false
+        }
+      }
+    },
+    "node_modules/vitest/node_modules/es-module-lexer": {
+      "version": "2.3.1",
+      "resolved": "https://registry.npmjs.org/es-module-lexer/-/es-module-lexer-2.3.1.tgz",
+      "integrity": "sha512-shc1dbU90Yl/xq1QrC7QRtfcwURZuVRfPhZbDoldJ1cn1gzDvBaBWlv0eFolj5+0znnPJz5TXLxsN77X/12KTA==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/vitest/node_modules/tinyexec": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/tinyexec/-/tinyexec-1.3.0.tgz",
+      "integrity": "sha512-QKAl9m8gWWGHV8jZcPeym6j+XULi6tOf1mT83WYJ4Lk2ytW/uwAWkrP0uFsdoYMdueVJ0qs26wZ+23xeB4ibNQ==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/vitest/node_modules/vite": {
+      "version": "8.2.1",
+      "resolved": "https://registry.npmjs.org/vite/-/vite-8.2.1.tgz",
+      "integrity": "sha512-EU/eS7BH3XROHh2YnBefjM6DBKA6ZeMZEYQbj7NLWg5wHYlhB8B/Mayd5XsgWq+NFYccDOTemRpdETWR6Ka/lw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "lightningcss": "^1.33.0",
+        "picomatch": "^4.0.5",
+        "postcss": "^8.5.25",
+        "rolldown": "~1.2.1",
+        "tinyglobby": "^0.2.17"
+      },
+      "bin": {
+        "vite": "bin/vite.js"
+      },
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      },
+      "funding": {
+        "url": "https://github.com/vitejs/vite?sponsor=1"
+      },
+      "optionalDependencies": {
+        "fsevents": "~2.3.3"
+      },
+      "peerDependencies": {
+        "@types/node": "^20.19.0 || >=22.12.0",
+        "@vitejs/devtools": "^0.4.0",
+        "esbuild": "^0.27.0 || ^0.28.0",
+        "jiti": ">=1.21.0",
+        "less": "^4.0.0",
+        "sass": "^1.70.0",
+        "sass-embedded": "^1.70.0",
+        "stylus": ">=0.54.8",
+        "sugarss": "^5.0.0",
+        "terser": "^5.16.0",
+        "tsx": "^4.8.1",
+        "yaml": "^2.4.2"
+      },
+      "peerDependenciesMeta": {
+        "@types/node": {
+          "optional": true
+        },
+        "@vitejs/devtools": {
+          "optional": true
+        },
+        "esbuild": {
+          "optional": true
+        },
+        "jiti": {
+          "optional": true
+        },
+        "less": {
+          "optional": true
+        },
+        "sass": {
+          "optional": true
+        },
+        "sass-embedded": {
+          "optional": true
+        },
+        "stylus": {
+          "optional": true
+        },
+        "sugarss": {
+          "optional": true
+        },
+        "terser": {
+          "optional": true
+        },
+        "tsx": {
+          "optional": true
+        },
+        "yaml": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/web-namespaces": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/web-namespaces/-/web-namespaces-2.0.1.tgz",
@@ -6694,6 +8067,23 @@
         "node": ">=4"
       }
     },
+    "node_modules/why-is-node-running": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/why-is-node-running/-/why-is-node-running-2.3.0.tgz",
+      "integrity": "sha512-hUrmaWBdVDcxvYqnyh09zunKzROWjbZTiNy8dBEjkS7ehEDQibXJ7XvlmtbwuTclUiIyN+CyXQD4Vmko8fNm8w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "siginfo": "^2.0.0",
+        "stackback": "0.0.2"
+      },
+      "bin": {
+        "why-is-node-running": "cli.js"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/widest-line": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/widest-line/-/widest-line-5.0.0.tgz",
diff --git a/package.json b/package.json
index 41bdc96..8884415 100644
--- a/package.json
+++ b/package.json
@@ -12,6 +12,7 @@
     "astro": "astro"
   },
   "dependencies": {
+    "@astrojs/node": "^8.3.4",
     "@astrojs/react": "^3.6.3",
     "@astrojs/tailwind": "^5.1.4",
     "@fontsource/inter": "^5.2.8",
@@ -19,9 +20,15 @@
     "@types/react": "^19.2.17",
     "@types/react-dom": "^19.2.3",
     "astro": "^4.16.0",
+    "nodemailer": "^9.0.5",
     "react": "^19.2.7",
     "react-dom": "^19.2.7",
     "react-icons": "^5.7.0",
     "tailwindcss": "^3.4.19"
+  },
+  "devDependencies": {
+    "@types/nodemailer": "^8.0.1",
+    "@vitest/coverage-v8": "^4.1.10",
+    "vitest": "^4.1.10"
   }
 }
diff --git a/tests/waasEngine.test.ts b/tests/waasEngine.test.ts
new file mode 100644
index 0000000..8bfdc16
--- /dev/null
+++ b/tests/waasEngine.test.ts
@@ -0,0 +1,53 @@
+import { describe, it, expect, beforeEach, afterEach } from 'vitest';
+import fs from 'fs';
+import path from 'path';
+import { loadWaasConfigs, FALLBACK_SITE_CONFIG, FALLBACK_THEME_CONFIG, FALLBACK_SMTP_CONFIG } from '../src/utils/configLoader';
+import { THEME_PRESETS } from '../src/utils/themePresets';
+
+describe('WaaS Engine Core Unit Tests', () => {
+  const testDataDir = path.join(process.cwd(), 'app', 'test_data');
+
+  beforeEach(() => {
+    process.env.DATA_DIR = testDataDir;
+    if (fs.existsSync(testDataDir)) {
+      fs.rmSync(testDataDir, { recursive: true, force: true });
+    }
+  });
+
+  afterEach(() => {
+    if (fs.existsSync(testDataDir)) {
+      fs.rmSync(testDataDir, { recursive: true, force: true });
+    }
+  });
+
+  it('1. Should return fallbacks when JSON files do not exist (Zero-Crash Guarantee)', () => {
+    const configs = loadWaasConfigs();
+    expect(configs.siteConfig.siteName).toBe(FALLBACK_SITE_CONFIG.siteName);
+    expect(configs.themeConfig.activePreset).toBe(FALLBACK_THEME_CONFIG.activePreset);
+    expect(configs.smtpConfig.host).toBe(FALLBACK_SMTP_CONFIG.host);
+  });
+
+  it('2. Should dynamically merge custom site.config.json', () => {
+    fs.mkdirSync(testDataDir, { recursive: true });
+    const customSite = { siteName: 'Custom Test Agency', hero: { title: 'Custom Title' } };
+    fs.writeFileSync(path.join(testDataDir, 'site.config.json'), JSON.stringify(customSite), 'utf8');
+
+    const configs = loadWaasConfigs();
+    expect(configs.siteConfig.siteName).toBe('Custom Test Agency');
+    expect(configs.siteConfig.hero.title).toBe('Custom Title');
+    expect(configs.siteConfig.hero.badge).toBe(FALLBACK_SITE_CONFIG.hero.badge);
+  });
+
+  it('3. Should have 10 valid Theme Presets with root CSS color tokens', () => {
+    const presetKeys = Object.keys(THEME_PRESETS);
+    expect(presetKeys.length).toBe(10);
+    expect(THEME_PRESETS.corporateDark.colors.bg).toBe('#0B0F19');
+    expect(THEME_PRESETS.corporateDark.colors.accent).toBe('#38BDF8');
+  });
+
+  it('4. Should support dynamic UIComponent elements in SectionConfig', () => {
+    const heroElements = FALLBACK_SITE_CONFIG.hero.elements || [];
+    expect(heroElements.length).toBeGreaterThan(0);
+    expect(heroElements[0].type).toBe('badge');
+  });
+});
\ No newline at end of file