Added doc for 'IMPORT_LOCAL_PATHS' (#3997)

docs/content/doc/advanced/config-cheat-sheet.en-us.md

@@ -145,6 +145,7 @@ Values containing `#` or `;` must be quoted using `` ` `` or `"""`.
    authentication.
 - `DISABLE_GIT_HOOKS`: **false**: Prevent all users (including admin) from creating custom
    git hooks.
+- `IMPORT_LOCAL_PATHS`: **false**: Prevent all users (including admin) from importing local path on server.
 
 ## OpenID (`openid`)