more explanation

examples/docker_image/docker-compose.yml

@@ -8,6 +8,6 @@ services:
     volumes:
       - ./app:/app # mounting local app directory
     environment:
-      - PUID=1000
-      - PGID=1000
+      - PUID=1000 # change this to your user id
+      - PGID=1000 # change this to your group id
       - STORAGE_SECRET="change-this-to-yor-own-private-secret"