CI: Pipeline updated add docker image build and image push to registry.

Author: Suharshit

.github/workflows/ci.yml

@@ -72,3 +72,34 @@ jobs:
 
       - name: Build
         run: pnpm build
+
+  docker:
+    name: Build & Push Docker Image
+    needs: ci
+    runs-on: ubuntu-latest
+    # Only push the Docker image when code is merged/pushed to the main branch
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          # Tags the image with your Docker Hub username and project name
+          tags: ${{ secrets.DOCKERHUB_USERNAME }}/ghost-ai:latest,${{ secrets.DOCKERHUB_USERNAME }}/ghost-ai:${{ github.sha }}
+          # The Dockerfile requires a DATABASE_URL for Prisma generate during build
+          build-args: |
+            DATABASE_URL=postgres://dummy:dummy@localhost:5432/dummy