update readme

docker-compose.yml

@@ -17,6 +17,7 @@ services:
     image: wongsaang/chatgpt-ui-wsgi-server:latest
     environment:
       - APP_DOMAIN=${APP_DOMAIN:-localhost:9000}
+      - SERVER_WORKERS=3 # The number of worker processes for handling requests.
       #      - DB_URL=postgres://postgres:postgrespw@localhost:49153/chatgpt # If this parameter is not set, the built-in Sqlite will be used by default. It should be noted that if you do not connect to an external database, the data will be lost after the container is destroyed.
       - DJANGO_SUPERUSER_USERNAME=admin # default superuser name
       - DJANGO_SUPERUSER_PASSWORD=password # default superuser password