Workflow fix

.github/workflows/build.yml

@@ -13,17 +13,23 @@ jobs:
         uses: docker/setup-buildx-action@v1
 
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v1 
+        uses: docker/login-action@v1
         with:
           registry: ghcr.io
-          repository: ${{github.repository}}
           username: ${{github.repository_owner}}
           password: ${{ secrets.GITHUB_TOKEN }}
 
+
+      - name: Lowercase repository
+        run: |
+          echo "REPO_LC=${REPO,,}" >> ${GITHUB_ENV}
+        env:
+          REPO: '${{ github.repository }}'
+
       -
         name: Build and push
         id: docker_build
         uses: docker/build-push-action@v2
         with:
           push: true
-          tags: ghcr.io/${{github.repository}}:latest
+          tags: ghcr.io/${{ env.REPO_LC }}:latest