add github action to build the api image

.github/workflows/api.yaml

@@ -0,0 +1,46 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+    branches: [ main ]  
+  # pull_request:
+  #   branches: [ main ]  # Optional: run on PRs to main branch
+  workflow_dispatch:
+
+
+env:
+  DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
+  IMAGE_NAME: viktorbarzin/realestatecrawler  
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.DOCKERHUB_USERNAME }}/${{ env.IMAGE_NAME }}
+          tags: |
+            latest
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: ./crawler/ 
+          push: ${{ github.ref == 'refs/heads/main' }}  # Only push if on main branch
+          # tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}