add pipeline for image build and push

.github/workflows/build-image.yaml

@@ -0,0 +1,35 @@
+name: Publish Docker image
+
+on:  
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  push_to_registry:
+    if: ${{ github.event.label.name == 'Build' }}
+    name: Push Docker image to Docker Hub
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v4
+      
+      - name: Log in to Docker Hub
+        uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+      
+    #   - name: Extract metadata (tags, labels) for Docker
+    #     id: meta
+    #     uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
+    #     with:
+    #       images: angelov/my-docker-hub-repository
+      
+      - name: Build and push Docker image
+        uses: docker/build-push-action@3b5e8027fcad23fda98b2e3ac259d8d67585f671
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: ${{ github.run_number }}