feat: add supervisor program for background worker

supervisor.conf.d/background-worker.conf

@@ -0,0 +1,30 @@
+[program:nextcloud-background-worker]
+; Root directory of your Nextcloud instance
+directory=/var/www/nextcloud
+
+; Exact command to run
+command=/usr/bin/local/php occ background-job:worker -v -t 60 "OC\\TaskProcessing\\SynchronousBackgroundJob"
+
+; Run directly as the www-data user
+user=www-data
+
+; Automatic start and restart
+autostart=true          ; start as soon as supervisord starts
+autorestart=true        ; always restart
+startsecs=10 			; 10 seconds after supervisord starts
+startretries=3          ; 3 attempts before considering it “failed”
+
+; Proper signal handling (useful if the worker spawns children)
+stopasgroup=true
+killasgroup=true
+
+; Dedicated logs for easier troubleshooting
+; stdout_logfile=/var/log/supervisor/nextcloud-worker.out.log
+; stderr_logfile=/var/log/supervisor/nextcloud-worker.err.log
+; stdout_logfile_maxbytes=5MB
+; stderr_logfile_maxbytes=5MB
+; stdout_logfile_backups=3
+; stderr_logfile_backups=3
+
+; (optional) Additional environment variables
+; environment=PATH="/usr/local/bin:/usr/bin:/bin"