Detail how to use pipenv

README.md

@@ -6,6 +6,18 @@ versions are detected
 
 ![Sample output](https://djib.fr/djib/PDMameUpdate/raw/branch/master/screenshot.png)
 
+## Installation
+You need to rename `config.template.json` to `config.json` and modify it with the proper information.
+
+You should have Python3 and a few libraries installed (see header in source code).
+
+If you have `pipenv` installed, then you can do:
+```shell
+pipenv --three
+pipenv install
+pipenv run python3 PDMameUpdate.py
+```
+
 ## Usage
 ```shell
 usage: PDMameUpdate.py [-h] [-l] [-d] [-c]