doc: add installation man

README.md

@@ -0,0 +1,25 @@
+# BACKEND
+
+## Installation
+
+- Clone the project:
+``` bash
+git clone https://git.chauvet.pro/michel/ft_transcendence
+cd ft_transcendence
+```
+- Create python virtual environnement.
+``` bash
+python3 -m venv .env
+```
+- Source the environnement.
+``` bash
+source .env/bin/activate
+```
+- Install the requirements
+``` bash
+pip install -r requirements.txt
+```
+- Start the developpement server
+```
+python manage.py runserver 0.0.0.0:8000
+```