fix casing issue

Author: dnmvisser

.github/workflows/docker-build-push.yml

@@ -15,11 +15,17 @@ jobs:
   build-and-push:
     runs-on: ubuntu-latest
     steps:
-      # 1. Checks-out your repository
+
+      # Needed for 'GEANT'...
+      - name: Set lower case repository
+        run: |
+          echo LC_REPO="${REPO,,}" >>${GITHUB_ENV}
+        env:
+          REPO: '${{ github.repository }}'
+
       - name: Checkout code
         uses: actions/checkout@v4
 
-      # 2. Logs in to the GitHub Container Registry (GHCR)
       # Uses the automatically generated GITHUB_TOKEN for authentication
       - name: Log in to GHCR
         uses: docker/login-action@v3
@@ -28,11 +34,11 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      # 3. Builds and pushes the Docker image to GHCR
+      # Builds and pushes the Docker image to GHCR
       # The image name is dynamically set to ghcr.io/OWNER/REPO_NAME
       - name: Build and push Docker image
         uses: docker/build-push-action@v5
         with:
           context: .
           push: true
-          tags: ghcr.io/${{ github.repository }}:latest
+          tags: ghcr.io/${{ env.LC_REPO }}:latest