The ws connection to 4010 is probably a different path related to live reload which is enabled in the dev env, can you check?
How are you configuring the cors_plug?
The tips in this thread might help How to: Embed a LiveView via iframe
The ws connection to 4010 is probably a different path related to live reload which is enabled in the dev env, can you check?
How are you configuring the cors_plug?
The tips in this thread might help How to: Embed a LiveView via iframe