Improve doc

README.md

@@ -5,9 +5,11 @@ Image with common dependencies to run pre-commit in Python apps/libraries:
 - common python packages: `python3-all python3-dev python3-pip python3-venv pylint3`
 - `build-essential` to allow local python package using `pip`
 - `pre-commit` and `git` commands
+- pre-install `pre-commit` environments for `pylint`, `pyupgrade`, `black` and `isort`
 
 To use it:
 
 ```bash
 docker run -it -v "$(pwd)":/src -w /src brenard/python-pre-commit
+pre-commit run --all-files
 ```