Add brief instructions for running Mullvad VPN CLI from docker or Podman

[caewok]

I have checked if others have suggested this already

• I have checked this issue tracker to see if others have reported similar issues.

Feature description

I have been trying to get Mullvad VPN CLI working from docker. It is non-trivial, because mullvad relies on systemd and Docker containers usually do not run systemd. From what I can tell, it looks like podman should be able to run systemd containers, but I have had no luck making that work.

From reading the issues in the Git here, it seems like others had similar problems but that a few commenters had successfully set up a docker container with the mullvad cli. So I thought it might be helpful to the community if someone who has gotten this to work could provide some instructions in the README or in wiki.

Related issues: #5431, #5408, #4894.

Alternative solutions

I tried https://github.com/gvkhna/docker-mullvadvpn/ without success. I also tried installing mullvad cli from a podman container, without success.

Type of feature

• Better privacy/anonymity
• Better at circumventing censorship
• Easier to use
• Other

Operating System

• Android
• iOS
• Windows
• macOS
• Linux

[the-me-0]

Hi @caewok !
I actually did manage to make the whole thing to run (and on arm64 on top of that). Based on @gvkhna's repository, 10 hours of troubleshooting, and with the help of the issue you posted in his repository.
Let me just create a repository on my side and I will link it right below in just a moment.

[the-me-0]

Can be accessed here : https://github.com/the-me-0/docker-mullvadvpn

[hemidark]

The addition of split tunneling also seems to block many/most container-oriented use cases now, per #3737