start rails from init.d service script and loads the correct version of ruby - ruby-on-rails

Question

I want to start rails server in production mode after installing, migrating and running some scripts in order for this script to be attached as pipeline deploy script.
The problem is that the same script doesn't work as service mode.
ubuntu#ip-x-y-z-w:~/backend.rails.com$ sudo vim /etc/init.d/rails-start-backend
#! /bin/sh
# Start/stop the rails server daemon.
#
### BEGIN INIT INFO
# Provides: rails server start
# Required-Start: $remote_fs $syslog
# Required-Stop: $remote_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Start daemon at boot time
# Description: Enable service provided by daemon.
### END INIT INFO
PATH=/bin:/usr/bin:/sbin:/usr/sbin
DESC="rails daemon"
NAME=rails
DAEMON=/home/ubuntu/backend.rails.com/gitlab-ci.sh
PIDFILE=/var/run/rails.pid
test -f $DAEMON || exit 0
. /lib/lsb/init-functions
case "$1" in
start)
log_daemon_msg "Starting rails"
/home/ubuntu/backend.rails.com/gitlab-ci.sh > /home/ubuntu/backend.rails.com/log/start_script.log
start_daemon -p $PIDFILE $DAEMON $EXTRA_OPTS
log_end_msg $?
;;
stop) log_daemon_msg "Stopping rails" "rails"
sudo kill -9 $(sudo lsof -t -i:3000)
killproc -p $PIDFILE $DAEMON
RETVAL=$?
[ $RETVAL -eq 0 ] && [ -e "$PIDFILE" ] && rm -f $PIDFILE
log_end_msg $RETVAL
;;
restart) log_daemon_msg "Restarting " "rails"
$0 stop
$0 start
;;
reload|force-reload) log_daemon_msg "Reloading rails" "rails"
# rails reloads automatically
log_end_msg 0
;;
*) log_action_msg "Usage: /etc/init.d/rails {start|stop|status|restart|reload|force-reload}"
exit 2
;;
esac
exit 0
and thats my gitlab-ci.sh script
cd /home/ubuntu/backend.rails.com
sudo chmod +x gitlab-ci.sh
rm config/master.key
rm config/credentials.yml.enc
echo "credentials"
RAILS_ENV=production EDITOR="mate --wait" rails credentials:edit
export RAILS_ENV=production
export FRONTEND_BASE_URL=https://www.rails.com
echo "bundle install"
bundle install
echo "rails db:migrate"
bundle exec rails db:migrate
echo "rails rake application:initialize"
bundle exec rake application:initialize
echo "kill"
sudo kill -9 $(sudo lsof -t -i:3000)
echo "start"
rails s &
The problem comes when I restarted the sudo service rails-start-backend restart service. It seems that in that context, all bundle, rails and ruby versions and settings are not the same as when I execute the same script manually in ssh.
The errors I get are:
/usr/bin/env: ‘ruby_executable_hooks2.6’: No such file or directory
bundle: not found
here's my PATH when ssh-logged
/home/ubuntu/.rvm/gems/ruby-2.6.5/bin:/home/ubuntu/.rvm/gems/ruby-2.6.5#global/bin:/usr/share/rvm/rubies/ruby-2.6.5/bin:/usr/share/rvm/bin:/home/ubuntu/bin:/home/ubuntu/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
and then when the script is executed as service
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games

Answer 1

It works after setting the right paths to the right variables (using 2.6.5 ruby version)
export PATH=/home/ubuntu/.rvm/gems/ruby-2.6.5/bin:/usr/share/rvm/bin:$PATH
export GEM_PATH=/home/ubuntu/.rvm/gems/ruby-2.6.5:/home/ubuntu/.rvm/gems/ruby-2.6.5#global:$GEM_PATH
source .bash_profile
source ~/.rvm/scripts/rvm