Enable legacy Github Docker Registry publishing workflow (#247)

* Update Docker publishing script

.github/workflows/docker_publish.yml

@@ -3,26 +3,26 @@
 # ------------------------------------------------------------------------
 
 name: publish
-# run only when pushing into the master, tagged with a v-prefix
+
 on:
   push:
     branches:
       - master
     tags:
       - 'v*'
+
 jobs:
   docker-publish:
-    name: Publish Docker image
     runs-on: ubuntu-latest
     steps:
-      - name: Get the source
-        uses: actions/checkout@v2
-      - name: Publish to GitHub Packages
-        uses: docker/build-push-action@v1
+      - uses: actions/checkout@v2
+
+      - uses: docker/build-push-action@v1
         with:
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
           add_git_labels: true
           tag_with_ref: true
-          username: ${{ github.ACTOR }}
-          password: ${{ secrets.GITHUB_TOKEN }}
+
           registry: docker.pkg.github.com
           repository: ${{ github.REPOSITORY }}/cloud-game