Fix Github Actions configuration

Author: Antoine Finkelstein

.github/workflows/dockerpublish.yml

@@ -34,7 +34,7 @@ jobs:
 
       - name: Push image
         run: |
-          IMAGE_ID=${{ github.repository }}/$IMAGE_NAME
+          IMAGE_ID=$IMAGE_NAME
           
           # Change all uppercase to lowercase
           IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')