Alas, it failed.
More info was pasted by me in this topic, if that helps.
Also pls mind that mine is 2 container setup.
Also, if that’s related:
:/var/www/discourse# LOAD_PLUGINS=1 bundle exec rake db:migrate
fatal: detected dubious ownership in repository at '/var/www/discourse'
To add an exception for this directory, call:
git config --global --add safe.directory /var/www/discourse