Implement semantic docker image tagging

Author: nir1r7

.github/workflows/ci.yml

@@ -2,9 +2,11 @@ name: CI
 
 on:
     push:
-        branches: ["*"]
+        branches: ["main"]
+        tags:
+          - "v*"
     pull_request:
-        branches: ["*"]
+        branches: ["main"]
 
 jobs:
     build-and-test:
@@ -57,25 +59,32 @@ jobs:
 
             # Log in to Github Container Registry
             - name: Log in to GHCR
-              if: github.ref == 'refs/heads/main'
+              if: github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/v')
               uses: docker/login-action@v3
               with:
                 registry: ghcr.io
                 username: ${{ github.actor }}
                 password: ${{ secrets.GITHUB_TOKEN }}
 
-            # Build and push Docker image (for main only)
-            - name: Build and push Docker image
-              if: github.ref == 'refs/heads/main'
-              run: |
-                IMAGE_NAME=ghcr.io/${{ github.repository_owner }}/eventrelay
-                IMAGE_TAG=${{ github.sha }}
-
-                docker build \
-                    -f backend/Dockerfile \
-                    -t $IMAGE_NAME:latest \
-                    -t $IMAGE_NAME:$IMAGE_TAG \
-                    backend
+            # Semantic Docker image tagging (relesae-grade)
+            - name: Dcoker metadata
+              id: meta
+              uses: docker/metadata-action@v5
+              with:
+                images: ghcr.io/${{ github.repository_owner }}/eventrelay
+                tags: |
+                  type=semver,pattern={{version}}
+                  type=semver,pattern={{major}}.{{minor}}
+                  type=semver,pattern={{major}}
+                  type=sha
 
-                docker push $IMAGE_NAME:latest
-                docker push $IMAGE_NAME:$IMAGE_TAG
+            # Build and push docker image (for main only)
+            - name: Build and push Docker image
+              uses: docker/build-push-action@v5
+              if: github.ref == 'refs/heads/main' || startWith(github.ref, 'refs/tags/v')
+              with:
+                context: backend
+                file: backend/Dockerfile
+                push: true
+                tags: ${{ steps.meta.outputs.tags }}
+                labels: ${{ steps.meta.outputs.labels }}