update docker action

Author: guilhem

.github/workflows/docker.yml

@@ -9,11 +9,24 @@ jobs:
     steps:
       - name: Check out the repo
         uses: actions/checkout@v2
-      - name: Push to GitHub Packages
-        uses: docker/build-push-action@v1
+
+      - name: Docker meta
+        id: docker_meta
+        uses: crazy-max/ghaction-docker-meta@v1
+        with:
+          images: ghcr.io/guilhem/rss-issues-action
+          tag-sha: true
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v1
         with:
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
           registry: ghcr.io
-          repository: guilhem/rss-issues-action
-          tag_with_ref: true
+          username: ${{ github.actor }}
+          password: ${{ github.token }}
+
+      - name: Push to GitHub Packages
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          tags: ${{ steps.docker_meta.outputs.tags }}
+          labels: ${{ steps.docker_meta.outputs.labels }}