fix docker release

Author: cbaker6

.github/workflows/image-release.yml

@@ -4,6 +4,12 @@ on:
   push:
     tags: [ '*.*.*' ]
 
+env:
+  # Use docker.io for Docker Hub if empty
+  REGISTRY: docker.io
+  # github.repository as <account>/<repo>
+  IMAGE_NAME: ${{ github.repository }}
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true