use fixed repository name as GHA will replace any refs by *** anyway

.github/workflows/docker-image.yml

@@ -15,28 +15,26 @@ jobs:
       contents: read
 
     steps:
-    - name: Replace underscores in tag name
-      run: NAME="$GITHUB.REPOSITORY"; echo DOCKER_TAG=${NAME//_//} >> $GITHUB_ENV
     - uses: actions/checkout@v3
     - # Activate cache export feature to reduce build time of image
       name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v2
     - name: Build the Docker image
-      run: make docker DOCKER_TAG=${{ env.DOCKER_TAG }}
+      run: make docker
     - name: Login to Dockerhub
       uses: docker/login-action@v2
       with:
         username: ${{ secrets.DOCKERHUB_USERNAME }}
         password: ${{ secrets.DOCKERHUB_PASSWORD }}
     - name: Push image to Dockerhub
-      run: docker push ${{ env.DOCKER_TAG }}
+      run: docker push bertsky/ocrd/detectron2
     - name: Alias the Docker image for GHCR
-      run: docker tag ${{ env.DOCKER_TAG }} ghcr.io/${{ env.DOCKER_TAG }}
+      run: docker tag bertsky/ocrd/detectron2 ghcr.io/bertsky/ocrd/detectron2
     - name: Login to GitHub Container Registry
       uses: docker/login-action@v2
       with:
         registry: ghcr.io
         username: ${{ github.actor }}
         password: ${{ secrets.GITHUB_TOKEN }}
     - name: Push image to Github Container Registry
-      run: docker push ghcr.io/${{ env.DOCKER_TAG }}
+      run: docker push ghcr.io/bertsky/ocrd/detectron2

Makefile

@@ -4,7 +4,7 @@ PYTHONIOENCODING=utf8
 SHELL = /bin/bash
 
 # Docker container tag
-DOCKER_TAG = 'bertsky/detectron2'
+DOCKER_TAG = 'bertsky/ocrd/detectron2'
 
 help:
 	@echo