[systemfreund]

Could you share details, please? Does it work out-of-the box or what do I need do do this?

Edit: Found it out myself. Install docker-tramp.el [1], `C-x C-f` to `/user@myserver|docker:mycontainer:/`

[1]: https://github.com/emacs-pe/docker-tramp.el

[taeric]

Apologies, having a day mostly out. That is indeed the package I am using. Glad you found it.