fix(ci): Make sure docker references are lower case

Author: sgillespie

.github/workflows/release-ghcr.yml

@@ -47,12 +47,23 @@ jobs:
 
       - name: Upload to ghcr.io
         run: |
+          # Downcase the package repository, because docker reference
+          # are required to be lower case
+          REPO_OWNER="$(echo ${{ github.repository_owner }} | tr '[:upper:]' '[:lower:]')"
+          IMAGE_REF="ghcr.io/$REPO_OWNER/cardano-db-sync"
+          IMAGE_TAG="$GITHUB_REF_NAME"
+
+          # Load the image from the nix build result
           docker load < result
+
+          # Tag the image
           docker image tag \
             cardano-db-sync:latest  \
-            ghcr.io/${{ github.repository_owner }}/cardano-db-sync:$GITHUB_REF_NAME
+            "${IMAGE_REF}:${IMAGE_TAG}"
+          # Also tag it as latest
           docker image tag \
             cardano-db-sync:latest  \
-            ghcr.io/${{ github.repository_owner }}/cardano-db-sync:latest
-          docker push ghcr.io/${{ github.repository_owner }}/cardano-db-sync:$GITHUB_REF_NAME
-          docker push ghcr.io/${{ github.repository_owner }}/cardano-db-sync:latest
+            "${IMAGE_REF}:latest"
+          # Push the tags above
+          docker push "${IMAGE_REF}:${IMAGE_TAG}"
+          docker push "${IMAGE_REF}:latest"