⚙️ .github: use docker's actions

.github/workflows/build-image.yml

@@ -19,7 +19,7 @@ jobs:
         id: meta
         uses: docker/metadata-action@v4
         with:
-          images: ghcr.io/{{ ENDPOINT }}
+          images: ghcr.io/${{ ENDPOINT }}
           tags: |
             type=ref,event=branch
             # set latest tag for default branch
@@ -34,7 +34,7 @@ jobs:
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }
+          password: ${{ secrets.GITHUB_TOKEN }}
       -
         name: Docker - Build and push
         uses: docker/build-push-action@v3