docs(docker): also relax permissions on write volumes for imported asset dirs

README.md

@@ -228,6 +228,7 @@ Only the CMS runs in Docker. The heavy client assets and gamedata stay on the ho
 
 ```bash
 sudo chown -R 33:33 ./public/nitro-assets ./public/swf ./storage
+sudo chmod -R o+rX ./public/nitro-assets ./public/swf ./storage
 ```
 
 If your host user UID differs, override the run user at build time (defaults to `www-data`, which already exists in the base image with UID/GID 33):