I can't launch Delayedjob as soon as my Rails server starts

I cannot launch DelayedJob as soon as I start my Rails application on my VPS on Ubuntu 22.04.

I have one project with Rails 7.1.2 (Ruby 3.0.0) which start with Passenger on apache2:

PassengerRuby /opt/rbenv/versions/3.0.0/bin/ruby

Problem: I have tried several solutions to launch it and it succeeds, but once it has launched all the remaining jobs, it exits automatically, but I would like it to be constantly open.

I tried with Crontab with @reboot (with whenever gem):

@reboot /bin/bash -l -c 'cd /var/www/extranet-rails/durbano-rails && RAILS_ENV=production /opt/rbenv/shims/bundle exec rake delayed_jobs:start --silent >> log/cron.log 2>&1'

My delayed_jobs:start task:

namespace :delayed_jobs do  desc 'Start delayed jobs'  task start: :environment do    system("/opt/rbenv/shims/bundle /var/www/extranet-rails/durbano-rails/bin/delayed_job start")  endend

I tried with service and exec script

[Unit]Description=Delayed Job WorkersAfter=network.target[Service]Type=simpleEnvironment="RAILS_ENV=production"WorkingDirectory=/var/www/extranet-rails/durbano-railsExecStart=/var/www/extranet-rails/durbano-rails/script.shRestart=on-failureRestartSec=5StandardOutput=syslogStandardError=syslogSyslogIdentifier=delayed_job[Install]WantedBy=multi-user.target

script.sh (with Foreman):

#!/bin/bashcd /var/www/extranet-rails/durbano-railsexport RAILS_ENV=productionecho "Starting foreman..." >> myapp.log 2>&1/opt/rbenv/shims/foreman start >> myapp.log 2>&1echo "Foreman terminated with exit code $?" >> myapp.log 2>&1

Procfile (Foreman):

delayed: /opt/rbenv/shims/bundle exec bin/delayed_job start

For all situations, I don't have any errors but it always quits on its own...

Note that if I run exactly the same command in my process, DelayedJob remains fine open even if there are no jobs to process.