Je viens de créer ma première instance mais j'ai besoin d'aide

But would that cause ports on the server to get closed? The Linode support tech I’ve been communicating with said that ports 80 and 443 got closed (and that’s what caused the site to be inaccessible).

The following is the syntax from the plugins section of the app.yml file:

# Plugins go here
## see https://meta.discourse.org/t/19157 for details
hooks:
  after_code:
    - exec:
        cd: $home/plugins
        cmd:
          - git clone https://github.com/discourse/docker_manager.git
          - git clone https://github.com/discourse/discourse-follow.git
          - git clone https://github.com/discourse/discourse-bcc.git