🚀 Enhance CI/CD: Add Docker build and push to DockerHub

- Build Docker image after successful tests and deployment
- Push to DockerHub on main branch updates only
- Integrate with existing Vercel deployment workflow

.github/workflows/test-and-deploy.yml

@@ -72,3 +72,25 @@ jobs:
         run: vercel pull --yes --environment=production --token=${{ secrets.VERCEL_TOKEN }}
       - name: Deploy to Vercel Production
         run: vercel deploy --prod --token=${{ secrets.VERCEL_TOKEN }}
+
+  build-and-push-docker:
+    needs: [test, deploy-production]
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up QEMU
+        uses: docker/[email protected]
+      - name: Set up Docker Buildx
+        uses: docker/[email protected]
+      - name: Login to DockerHub
+        uses: docker/[email protected]
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Build and push
+        uses: docker/[email protected]
+        with:
+          context: .
+          push: true
+          tags: ${{ secrets.DOCKERHUB_USERNAME }}/pft:latest