The Procfile is for development only

Procfile

+# For DEVELOPMENT only. Production uses Runit in
+# https://gitlab.com/gitlab-org/omnibus-gitlab or the init scripts in
+# lib/support/init.d, which call scripts in bin/ .
+#
 web: bundle exec unicorn_rails -p ${PORT:="3000"} -E ${RAILS_ENV:="development"} -c ${UNICORN_CONFIG:="config/unicorn.rb"}
 worker: bundle exec sidekiq -q post_receive -q mailer -q archive_repo -q system_hook -q project_web_hook -q gitlab_shell -q incoming_email -q runner -q common -q mailers -q default
 # mail_room: bundle exec mail_room -q -c config/mail_room.yml