add docker hub image, fixes #541

.github/workflows/workflow.yml

@@ -55,11 +55,17 @@ jobs:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Login to hub.docker.com
+        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3.4.0
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
       - name: Extract metadata (tags, labels) for Docker
         id: meta
         uses: docker/metadata-action@902fa8ec7d6ecbf8d84d538b9b233a880e428804 # v5.7.0
         with:
           images: |
+            ${{ github.repository }}
             ghcr.io/${{ github.repository }}
             registry.etke.cc/${{ github.repository }}
           tags: |

README.md

@@ -55,7 +55,7 @@ The full list is described below in the [Changes](#changes) section.
 * As a core/default component on [etke.cc](https://etke.cc/?utm_source=github&utm_medium=readme&utm_campaign=synapse-admin)
 * As a standalone app on [admin.etke.cc](https://admin.etke.cc)
 * As a prebuilt distribution on [GitHub Releases](https://github.com/etkecc/synapse-admin/releases)
-* As a Docker container on [GitHub Container Registry](https://github.com/etkecc/synapse-admin/pkgs/container/synapse-admin)
+* As a Docker container on [Docker Hub](https://hub.docker.com/r/etkecc/synapse-admin) and [GitHub Container Registry](https://github.com/etkecc/synapse-admin/pkgs/container/synapse-admin)
 * As a component in [Matrix-Docker-Ansible-Deploy Playbook](https://github.com/spantaleev/matrix-docker-ansible-deploy/blob/master/docs/configuring-playbook-synapse-admin.md)
 
 ### Changes