push image to github packages (#75)

Author: DuodenumL

.github/workflows/dockerimage.yml

@@ -14,7 +14,16 @@ jobs:
       - name: checkout
         uses: actions/checkout@v2
 
-      - name: build and push
+      - name: build and push to github packages
+        uses: docker/build-push-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+          tag_with_ref: true
+          tag_with_sha: false
+
+      - name: build and push to docker hub
         uses: docker/build-push-action@v1
         with:
           repository: projecteru2/cli