feat: integrate containers & Docker Compose into YunoHost

YunoHost is good but when you want to add apps outside, containerized app it integrates: code nginx part, install the app generically. Do Docker first then docker compose later: make a collection that extends YunoHost. Variable structure for Docker

It opens possibilities to go fast.

• Variables for Docker Compose file (image, name, ports, volumes)
• Tasks for Docker Compose (copy template to server, run Docker compose file
• Tasks for YunoHost (redirect app, post-install scripts)