Write good installation instructions

Author: guillaume-chevalier

README.md

@@ -1,17 +1,23 @@
 # Python Requirements License Checker
 
-## Instructions
+## Installation Instructions
 
-To add the license checker to your project, do the following when your console is located in the root of your project in your local computer: 
+To add the license checker to your project's main branch, assuming your main branch is called `main`, do the following when your console is located in the root of your GitHub project in your local computer: 
 
 ```bash
-git remote add license-checker github.com/Neuraxio/Python-Requirements-License-Checker
-git checkout license-checker
+git remote add license-checker [email protected]:Neuraxio/Python-Requirements-License-Checker.git
+git fetch --all
+git checkout action
 git pull license-checker action
-git checkout master
-git merge action
-git push origin master
+git checkout main
+git merge action --allow-unrelated-histories
+git push origin main
 ```
+
+You may edit the line 4 and 7 of your copy of the file `./.github/workflows/python_license_checker.yml` to change the branch on which the action happen. 
+
+You may as well change the checked licenses at lines 13-18 of `./.github/workflows/license_checker_v2.py`. 
+
 ## Example
 
-You can see an example of the action in the example branch. Do not use the python python_license_checker.yml file in that branch because it has been modified to execute on push and pull request on that specific branch.
+You can see an example of the action in the example branch. Do not use the python `python_license_checker.yml` file in that branch because it has been modified to execute on push and pull request on that specific branch only. You can push changes to the `requirements.txt` file of your fork or copy of this example branch to test it and visualize the checks in your project's GitHub UI.