Migrate from DockerHub to GHCR.

.github/workflows/build-push-dockerhub.yaml

@@ -5,26 +5,16 @@ on:
   push:
     branches:
       - 'main'
+      - 'migrate-to-ghcr'
 
 jobs:
   docker:
     runs-on: ubuntu-latest
     steps:
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v2
+      - uses: actions/checkout@v2
 
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
-
-      - name: Login to Docker Hub
-        uses: docker/login-action@v2
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-
-      - name: Build and push
-        uses: docker/build-push-action@v4
+      - name: Build and publish Docker image for ${{ github.repository }}
+        uses: macbre/push-to-ghcr@master
         with:
-          push: true
-          tags: ${{ vars.DOCKERHUB_TAG }}
-
+          image_name: ${{ github.repository }}
+          github_token: ${{ secrets.GITHUB_TOKEN }}