feat(docker): add production Dockerfile, docker-compose setup and healthcheck API

tests/health.test.ts

@@ -0,0 +1,18 @@
+import { describe, it, expect } from 'vitest';
+import fs from 'node:fs/promises';
+import path from 'node:path';
+
+const DATA_DIR = path.join(process.cwd(), 'app', 'test_data_health');
+
+describe('Healthcheck API Test', () => {
+  it('soll Volume-Ordner erfolgreich erstellen und beschreiben können', async () => {
+    await fs.mkdir(DATA_DIR, { recursive: true });
+    const testFile = path.join(DATA_DIR, '.vitest_health');
+    
+    await fs.writeFile(testFile, 'test', 'utf-8');
+    const content = await fs.readFile(testFile, 'utf-8');
+    await fs.unlink(testFile);
+
+    expect(content).toBe('test');
+  });
+});