Docker isnt build for these type of Programms. You should look into sandbox environments to test these apps.

Arma 3 6300 Factorio 1100 Rainbow six 766 Heats of iron 4 760 RimWorld 700.... Ja ich habe kein Leben....

Alles durch... Und modding/Scripting.

I don't use the tool you mentioned above. but I can recommend graylog for this. For emails just use the Mailserver form proton or Google. Setting one up is a loot of work and even then gets probably banned by all major ones...

Take a look at the Ansible playbook for Lemmy as it Does exactly this. Installing one Nginx on the host system and using one in docker. You can probably pull configuration examples from it.