When setting up a new Rails app with Docker:
Add the following to config/development.rb, below config.log_level = :debug:
# Prepend all log lines with the following tags.
config.log_tags = [ :subdomain, :uuid, :host ]
# Workaround issue where logging to STDOUT is incompatible with quiet_assets. See:
# https://github.com/rails/sprockets-rails/issues/376#issuecomment-287560399