fix(docker): add permissions GITHUB_TOKEN (#60)

Author: jean-humann

.github/workflows/publish.yml

@@ -29,6 +29,9 @@ jobs:
   publish-docker:
     name: Publish docker images
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
     env:
       REGISTRY: ghcr.io
       IMAGE_NAME: ${{ github.repository }}
@@ -44,7 +47,7 @@ jobs:
       - name: Login to GitHub Packages
         uses: docker/login-action@v1
         with:
-          registry: docker.pkg.github.com
+          registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Extract metadata (tags, labels) for Docker