Merge pull request #784 from ELEVATE-Project/githib-actions

add: github action to publish docker image

Author: nevil-mathew

.github/workflows/docker-image.yml

@@ -0,0 +1,87 @@
+name: Build and Push Docker Image
+
+on:
+  workflow_dispatch:
+    inputs:
+      tag_version:
+        description: 'Docker image tag version (e.g., 3.3.11)'
+        required: true
+
+env:
+  DOCKER_IMAGE_NAME: elevate-user  # Configure your image name here
+  DOCKER_REGISTRY: docker.io
+  DOCKER_NAMESPACE: shikshalokamqa
+
+jobs:
+  docker-image-build-and-push:
+    if: github.event_name == 'workflow_dispatch' && github.ref == 'refs/heads/docker-image'
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      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: ${{ secrets.DOCKERHUB_TOKEN }}
+
+    - name: Get Docker tag version (fail if not provided)
+      id: get-version
+      run: |
+        # Use workflow_dispatch input if provided
+        if [ ! -z "${{ github.event.inputs.tag_version }}" ]; then
+          VERSION="${{ github.event.inputs.tag_version }}"
+        # Or use TAG_VERSION env if set (for push/PR)
+        elif [ ! -z "${TAG_VERSION}" ]; then
+          VERSION="${TAG_VERSION}"
+        else
+          echo "Error: Docker image version must be provided as workflow_dispatch input or TAG_VERSION env."
+          exit 1
+        fi
+        echo "version=$VERSION" >> $GITHUB_OUTPUT
+
+    - name: Check if version exists on Docker Hub
+      id: check-version
+      run: |
+        VERSION=${{ steps.get-version.outputs.version }}
+        RESPONSE=$(curl -s -o /dev/null -w "%{http_code}" "https://hub.docker.com/v2/namespaces/${{ env.DOCKER_NAMESPACE }}/repositories/${{ env.DOCKER_IMAGE_NAME }}/tags/$VERSION")
+        if [ "$RESPONSE" -eq 200 ]; then
+          echo "Error: Tag $VERSION already exists on Docker Hub"
+          exit 1
+        else
+          echo "Tag $VERSION does not exist, proceeding with build"
+        fi
+
+    - name: Extract metadata
+      id: meta
+      uses: docker/metadata-action@v5
+      with:
+        images: ${{ env.DOCKER_REGISTRY }}/${{ env.DOCKER_NAMESPACE }}/${{ env.DOCKER_IMAGE_NAME }}
+        tags: |
+          type=raw,value=${{ steps.get-version.outputs.version }}
+
+    - name: Build and push Docker image
+      id: build
+      uses: docker/build-push-action@v5
+      with:
+        context: .
+        file: ./Dockerfile
+        push: true
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+        platforms: linux/amd64,linux/arm64
+        cache-from: type=gha
+        cache-to: type=gha,mode=max
+
+    - name: Image digest
+      run: echo "Image pushed with digest  ${{ steps.build.outputs.digest }}"
+
+    - name: Print pushed tags
+      run: |
+        echo "Pushed tags:"
+        echo "${{ steps.meta.outputs.tags }}" | tr ',' '\n'