docker registry login debug

.github/workflows/main.yml

@@ -104,7 +104,7 @@ jobs:
           echo '{ "auths": { "https://index.docker.io/v1/": { "auth": "---CHANGEME---" } } }' > config.json
           # debug:
           #echo -n "$DOCKERHUB_USER:$DOCKERHUB_PASS" | base64
-          sed -i "s@---CHANGEME---@$( echo $DOCKERHUB_USER:$DOCKERHUB_PASS | base64 )@g" config.json
+          sed -i "s@---CHANGEME---@$( echo -n $DOCKERHUB_USER:$DOCKERHUB_PASS | base64 )@g" config.json
           # debug
           #cat config.json | base64