Update README.md

README.md

@@ -4,9 +4,36 @@
 
 An extended commonmark compliant parser, with bridges to docutils & sphinx.
 
-NOTE: this parser currently requires the [ExecutableBookProject/mistletoe](https://github.com/ExecutableBookProject/mistletoe)
+## Installing
+
+This parser currently requires the [ExecutableBookProject/mistletoe](https://github.com/ExecutableBookProject/mistletoe)
 fork of mistletoe (and the myst branch).
 
 ```console
 pip install git+https://github.com/ExecutableBookProject/mistletoe.git@myst
 ```
+
+## Contributing
+
+Code style is tested using [flake8](http://flake8.pycqa.org),
+with the configuration set in `.flake8`,
+and code formatted with [black](https://github.com/ambv/black).
+
+Installing with `myst_parser[code_style]` makes the [pre-commit](https://pre-commit.com/)
+package available, which will ensure this style is met before commits are submitted, by reformatting the code
+and testing for lint errors.
+It can be setup by:
+
+```shell
+>> cd myst_parser
+>> pre-commit install
+```
+
+Optionally you can run `black` and `flake8` separately:
+
+```shell
+>> black .
+>> flake8 .
+```
+
+Editors like VS Code also have automatic code reformat utilities, which can adhere to this standard.