docs: update README

README.md

@@ -15,3 +15,17 @@
 3. Change dir to the repo, `cd JOJ3-config-generator`
 4. Install deps by `pdm install && pdm run pre-commit install`
 5. Run the cli app by `pdm run app --help`
+
+## How to use?
+
+- `joj3-config-generator convert` function is now supported, currently support three flags:
+
+```shell
+-d/--distribute: Add it without other input, it indicates script is ready to convert things other than testcases within the project
+-c/--conf-root: This is where you want to put all your 'task.toml' type folders, default choice for your input can be '/home/tt/.config/joj/'
+-r/--repo-root: This would be where you put your 'repo.toml' file as well as your 'immutable files', they should all be at same place, default choice for your input can be 'immutable_files', which is the folder at the position '/home/tt/.config/joj/'
+```
+- sample command on the server
+```shell
+joj3-config-generator convert -d -c /home/tt/.config/joj/ -r immutable_files
+```