fix: update permissions for Docker publish job in CI workflow

.github/workflows/docker-publish.yml

@@ -7,6 +7,9 @@ on:
 jobs:
   docker_publish:
     runs-on: "ubuntu-latest"
+    permissions:
+      contents: read
+      packages: write
 
     steps:
       - uses: actions/checkout@v2
@@ -16,4 +19,4 @@ jobs:
         uses: macbre/push-to-ghcr@master
         with:
           image_name: ${{ github.repository }}
-          github_token: ${{ secrets.GITHUB_TOKEN }}
+          github_token: ${{ secrets.GITHUB_TOKEN }}