Problem with Start RViz in the Docker container

[junmeng6025]

I have run the command

sudo docker run -it --rm -p 6080:80 -p 10000:10000 --shm-size=1024m unity-robotics:nav2-slam-example

in my terminal, but got this:

* enable custom user: rosdev
useradd: user 'rosdev' already exists
  set default password to "ubuntu"
cp: cannot stat '/root/.config': No such file or directory

where claiming
cp: cannot stat '/root/.config': No such file or directory

[junmeng6025]

It's not a problem. The host terminal is waiting for the remote terminal on 127.0.0.1:6080