My forum goes down when I do launcher rebuild app

Very first actual line starting hooks: can’t be right. It should be something like

hooks:
  after_assets_precompile:
    - exec:
        cd: $home
        cmd:
          - sudo -E -u discourse bundle exec rake s3:upload_assets
          - sudo -E -u discourse bundle exec rake posts:rebake
  after_code:
    - exec:
        cd: $home/plugins
        cmd:
          - git clone https://github.com/discourse/docker_manager.git

Well, not exacly like that because this is from mine, but lines, intends etc should be similar.