publish on github registry

Author: MaxWaldorf

.github/workflows/docker-image-dev.yml

@@ -53,12 +53,20 @@ jobs:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
 
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Docker meta
         id: meta
         uses: docker/metadata-action@v5
         with:
           images: |
             flcontainers/guacamole
+            ghcr.io/${{ github.repository }}
           tags: |
             type=schedule,pattern=testing
             type=raw,value=testing