Add template for Seafile

[Domenicopezzullo]

What problem will this feature address?
Self-hosted file hosting

Describe the solution you'd like
Seafile template added to dokploy

Describe alternatives you've considered
I like seafile specifically

Additional context
No response

Will you send a PR to implement it?
No

[maelp]

Would be nice indeed! Here's the doc https://manual.seafile.com/11.0/docker/deploy_seafile_with_docker/

[nktnet1]

I made a draft in #135, if you could help test it.

Important

1. configure your domain before the first deployment (will need to change multiple config files if you want to tweak it afterwards, as the environment variables are only on first deploy)
2. If it doesn't work and you're getting a 504 gateway timeout, disable the "isolated compose" feature (under "Show Utilities) that gets turned on by default for templates. Still trying to figure this out. More details in the linked PR.