eglot, pyright and docker not working well

[nettoyoussef]

Hi.

I am able to set up pyright inside docker, but only with the npm version (the pip version is not installing the pyright-langserver command for some reason).
So, inside the container I have to install both npm (apt install npm), and then, pyright (npm -g install pyright).
Using this method, once inside the container, eglot is able to open the language server using both tramp and docker-tramp.
For example: /docker:root@container:/path/on/the/container.

However no help documentation is available with this server, while, with the same process, they are with the pylsp server.
Basically, I get "Import could not be resolved" for most libraries.
This is probably a configuration problem regarding paths.
Since I am using an Ubuntu image, my user's python is on /usr/local/bin/python3, and I think pyright is using the
image system-wide python installation on /usr/bin/python3 (which leads to not resolving the imports).
I am using the official docker image python:3.9.7.

Any suggestions on what should I try to make this work?