JCalebBR

The game doesn't launch due to failed install of Paradox Launcher. 
After attempting to manually install by running msiexec on the same wine/proton prefix and failing,
I decided to install Europa Universalis IV, which is also a paradox game and copy over the launcher files from that game's compatdata (Program Files x64, AppData/Local and AppData/Roaming)
And that did the trick!

1. Install EU4 and Stellaris, make sure to force on both the same proton version (I used 6.3-7);
2. Hit Play on Stellaris, it will install multiple requirements then not launch;
3. Hit Play on EU4, it will do the same but eventually reach the Paradox Launcher;
2. The launcher will need to restart multiple times until it reaches the latest available version (atm it's 2021.8.1);
3. Close the game;

styblope

Enable TCP port 2375 for external connection to Docker

See this issue.
Docker best practise to Control and configure Docker with systemd.

1. Create daemon.json file in /etc/docker:

    {"hosts": ["tcp://0.0.0.0:2375", "unix:///var/run/docker.sock"]}