push to ghcr instead of dockerhub

Author: flyerhzm

.github/workflows/push.yml

@@ -18,11 +18,12 @@ jobs:
       - name: Login to DockerHub
         uses: docker/login-action@v1
         with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build and push
         uses: docker/build-push-action@v2
         with:
           push: true
-          tags: ${{ github.repository  }}:${{ steps.sha.outputs.sha7 }}
+          tags: ghcr.io/${{ github.repository_owner }}/${{ github.event.repository.name }}:${{ steps.sha.outputs.sha7 }}