ENT-23: add hooks for running pre- and post-init scripts

docker-compose.yml

@@ -14,6 +14,7 @@ services:
       test: "curl -f http://localhost:8080/login/ || exit 1"
     volumes:
     - ./configuration:/etc/netbox/config:z,ro
+    - init-files:/opt/init:ro
     - netbox-media-files:/opt/netbox/netbox/media:rw
     - netbox-reports-files:/opt/netbox/netbox/reports:rw
     - netbox-scripts-files:/opt/netbox/netbox/scripts:rw
@@ -72,6 +73,8 @@ services:
     - netbox-redis-cache-data:/data
 
 volumes:
+  init-files:
+    driver: local
   netbox-media-files:
     driver: local
   netbox-postgres-data: