Please show how to connect to container

[datntvn]

From your video: https://www.youtube.com/watch?v=rldCgECorNs

I could see that you use xpra to show a Window Manager (i.e: Mutter Muffin).
And you enter command as: gource & at iterm2 then xpra will show UI of that command.

I also tried to use ssh command to connect but failed to connect.
I also execute command "glxinfo" and "glxgear" but not found.
Error as bash: glxinfo: command not found and bash: glxgear: command not found
Could you please help to show which steps to do the same?

Thank you so much.
P/S: I could access by web browser to : localhost:8080 and see a mp4 video.
I started the docker with command below
docker run --network bridge --rm -p 1337:22 -p 8080:80 --name envisaged \ -e GIT_URL=https://github.com/addyosmani/bubblesort.git \ -e LOGO_URL=https://raw.githubusercontent.com/kubernetes/kubernetes/master/logo/logo.png \ -e GOURCE_TITLE="Bubble Sort" \ utensils/envisaged

I also connect to the running container, and execute command "glxinfo" but error is as command not found . I wonder whether the youtube video demo with another image, and the docker image available at this repo are different images.

Whether the ssh server is on your host computer, or on your container?
From the video, I guess that you ssh from container to your host, but when I tried to connect from inside container to host, I got error bash: ssh: command not found

Whether the X server is on your host computer, or on your container?
And how could you open/start mutter-muffin from within container (I mean, which command?)