Simplify Self-Host Deployment

[ItsRaelx]

closes #11
closes #10

As in feature request:

To improve the user experience, I propose that we consolidate our self-host deployment configuration into a single docker-compose.yml file. This approach would offer several benefits:

• Easier deployment for users, as they would only need to manage one file
• Elimination of duplicated environment variables, which could be moved from example.env to docker-compose.yml
• Resolution of the Windows-specific issue reported in Self hosting error? #10
• Automated folder creation by docker-compose, reducing the manual effort required from users

Also i don't think storing docker-compose.yml inside repository (that pulls from docker hub instead of building from source) is a good idea.

[pluja]

looks good, I think it's fine to simplify