I can get there no problem, is there a way to attach to the bedrock_server application that is running to issue the /permissions reload?
Edit: I should state I am trying to add myself to the operator group, I have edited the permissions.json. I tried restarting the container, but it doesn't seem like it is loading.
Edit2: I just realized the permissions were working, I just didn't know the limitations of the this version of minecraft.