ci: add automated docker build, push, and Coolify redeploy steps

.gitea/workflows/ci.yaml

@@ -36,10 +36,11 @@ jobs:
           npm ci
           node --check server.js database.js mail.js
 
-  docker-build:
-    name: Docker Build Validation
+  docker-build-and-push:
+    name: Build & Push Docker Images
     runs-on: ubuntu-latest
     needs: validate-and-build
+    if: github.ref == 'refs/heads/master' || github.ref == 'refs/heads/main'
 
     steps:
       - name: Checkout repository
@@ -48,5 +49,31 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
-      - name: Build Docker Compose Stack
-        run: docker compose build
+      - name: Log in to Gitea Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: git.digifox.live
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITEA_TOKEN || secrets.GITHUB_TOKEN }}
+
+      - name: Build and Push Frontend Image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: git.digifox.live/digifoxkurama/titan-web:latest
+
+      - name: Build and Push Backend Image
+        uses: docker/build-push-action@v6
+        with:
+          context: ./backend
+          file: ./backend/Dockerfile
+          push: true
+          tags: git.digifox.live/digifoxkurama/titan-api:latest
+
+      - name: Trigger Coolify Zero-Downtime Redeploy
+        run: |
+          curl -s -X POST \
+            -H "Authorization: Bearer ${{ secrets.COOLIFY_API_TOKEN || '8|fPDOJYtoML5NxxGMJdN4OHbCIfyME8vwcvYtlWab7939e30c' }}" \
+            https://deploy.digifox.live/api/v1/services/lbvulal59jsvjqi4rvfw8i4q/restart