Add missing Label and cleanup

.github/workflows/actions.yml

@@ -5,7 +5,8 @@ on:
     branches:
       - main
 env:
-  IMAGE_REPO: ghcr.io/fluttershub
+  IMAGE_REGISTRY: ghcr.io
+  IMAGE_OWNER: fluttershub
   IMAGE_NAME: homepage
 
 jobs:
@@ -24,8 +25,8 @@ jobs:
       - name: Login to ghcr.io
         uses: docker/login-action@v1
         with:
-          registry: ghcr.io
-          username: fluttershub
+          registry: ${{ env.IMAGE_REGISTRY }}
+          username: ${{ env.IMAGE_OWNER }}
           password: ${{ secrets.CR_PAT }}
 
       - name: Build and push
@@ -33,7 +34,8 @@ jobs:
         uses: docker/build-push-action@v2
         with:
           push: true
-          tags: ${{ env.IMAGE_REPO }}/${{ env.IMAGE_NAME }}:latest
+          labels: org.opencontainers.image.source https://github.com/${{ env.IMAGE_OWNER }}/${{ env.IMAGE_NAME }}
+          tags: ${{ env.IMAGE_REGISTRY }}/${{ env.IMAGE_OWNER }}/${{ env.IMAGE_NAME }}:latest
   Deploy:
     runs-on: ubuntu-latest
     needs: BuildImage