Start supervisord

Ref: https://advancedweb.hu/supervisor-with-docker-lessons-learned/

deploy/inventree.conf

@@ -13,6 +13,7 @@
 [supervisord]
 ; Change this path if log files are stored elsewhere
 logfile=/home/inventree/log/supervisor.log
+nodaemon=true
 
 [program:inventree-server]
 user=inventree