* Improve Docker container name
Use a better Docker container name than the default 'server'
* Changing to gitea and use recommended v3 Docker-compose
Use `gitea` as container name. And use version 3 of the docker-compose, which should now be used: https://docs.docker.com/compose/compose-file/compose-versioning/
Co-authored-by: techknowlogick <techknowlogick@gitea.io>