feat: push commit to ghcr, keep clean dockerhub release

.github/workflows/docker.yml

@@ -46,6 +46,11 @@ jobs:
       if: github.ref == 'refs/heads/main' && github.repository == 'georchestra/georchestra-gateway'
       run: docker push georchestra/gateway:latest
 
+    - name: "Pushing release branch to docker.io"
+      if: contains(github.ref, 'refs/heads/1.') && github.repository == 'georchestra/georchestra-gateway' && github.actor != 'dependabot[bot]' && github.event_name != 'pull_request'
+      run: |
+        docker push georchestra/gateway:${{ steps.version.outputs.VERSION }}
+
     - name: "Push tagged image to docker.io"
       if: github.ref_type == 'tag' && github.ref != 'refs/heads/main' && github.repository == 'georchestra/georchestra-gateway'
       run: docker push georchestra/gateway:${{ steps.version.outputs.VERSION }}
@@ -60,11 +65,19 @@ jobs:
         readme-filepath: ./DOCKER_HUB.md
         short-description: 'Gateway module for the geOrchestra SDI'
 
+    - name: Login to GitHub Container Registry
+      if: github.ref == 'refs/heads/main' && github.repository == 'georchestra/georchestra-gateway'
+      uses: docker/login-action@v1
+      with:
+        registry: ghcr.io
+        username: ${{ github.actor }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
     - name: "Push image attached to commit id to docker.io"
       if: github.ref == 'refs/heads/main' && github.repository == 'georchestra/georchestra-gateway'
       run: |
-        docker tag georchestra/gateway:latest georchestra/gateway:commit-${{ github.sha }}
-        docker push georchestra/gateway:commit-${{ github.sha }}
+        docker tag georchestra/gateway:latest ghcr.io/georchestra/georchestra-gateway/gateway:commit-${{ github.sha }}
+        docker push ghcr.io/georchestra/georchestra-gateway/gateway:commit-${{ github.sha }}
 
     - name: "Remove SNAPSHOT jars from repository"
       run: |