Push image to GHCR

.github/workflows/unit_tests.yaml

@@ -8,6 +8,7 @@ jobs:
 
     permissions:
       contents: read
+      packages: write
 
     steps:
       - name: Checkout repository
@@ -16,12 +17,24 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
+      - name: Extract container metadata
+        id: meta
+        if: github.event_name == 'push' && github.repository == 'koreader/koreader-sync-server'
+        uses: docker/metadata-action@v5
+        with:
+          images: ghcr.io/${{ github.repository_owner }}/kosync
+          tags: |
+            type=raw,value=latest,enable={{is_default_branch}}
+            type=ref,event=tag
+            type=sha,prefix=sha-
+
       - name: Build image
         uses: docker/build-push-action@v5
         with:
           context: .
           push: false
           load: true
+          labels: ${{ steps.meta.outputs.labels }}
           tags: |
             koreader/kosync:test
             koreader/kosync:latest
@@ -36,3 +49,21 @@ jobs:
           docker run -d --name kosync-test koreader/kosync:test
           sleep 5
           docker exec kosync-test /app/koreader-sync-server/scripts/healthcheck.sh
+
+      - name: Log in to GitHub Container Registry
+        if: github.event_name == 'push' && github.repository == 'koreader/koreader-sync-server'
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Push GHCR image
+        if: github.event_name == 'push' && github.repository == 'koreader/koreader-sync-server'
+        run: |
+          while IFS= read -r tag; do
+            docker tag koreader/kosync:test "$tag"
+            docker push "$tag"
+          done <<'EOF'
+          ${{ steps.meta.outputs.tags }}
+          EOF