Document how to run lint in README

Signed-off-by: Arthur Diniz <arthurbdiniz@gmail.com>

Author: arthurbdiniz

README.md

@@ -144,7 +144,7 @@ deactivate
 pip3 install --editable .
 ```
 
-#### Run tests
+#### Run tests and lint
 First make sure to install the test dependencies:
 ```
 pip3 install -r requirements-test.txt
@@ -155,6 +155,11 @@ To run the test suite:
 pytest -v tests/
 ```
 
+To run the lint check:
+```bash
+flake8 . --count --max-complexity=10 --max-line-length=127 --statistics --exclude env
+```
+
 #### Manualy generate binary
 ```bash
 pyinstaller --clean --hidden-import one.__main__ cli.py --onefile --noconsole -n one