Fix global error page, update CI workflow, add Dockerfile

.gitea/workflows/staging.yaml

@@ -19,5 +19,25 @@ jobs:
 
       - name: Staging-Build generieren
         env:
-          NODE_ENV: development
+          NODE_ENV: production
         run: npm run build
+
+      - name: Docker login to Gitea registry
+        run: echo ${{ secrets.GITEA_TOKEN }} | docker login gitea.hephex.de -u ${{ secrets.GITEA_USER }} --password-stdin
+        env:
+          GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
+      - name: Build Docker image
+        run: docker build -t gitea.hephex.de/daniel/webshop:staging .
+        working-directory: ..
+      - name: Push Docker image
+        run: docker push gitea.hephex.de/daniel/webshop:staging
+        working-directory: ..
+      - name: Deploy to Proxmox LXC via SSH
+        uses: appleboy/ssh-action@v0.1.5
+        with:
+          host: 192.168.1.51
+          username: ${{ secrets.PROXMOX_USER }}
+          key: ${{ secrets.PROXMOX_SSH_KEY }}
+          script: |
+            cd /path/to/deployment
+            docker compose pull webshop && docker compose up -d webshop