Added build imtructions in mainpage on the readme

README.md

@@ -2,8 +2,44 @@
 
 ## Resume
 
+## Generate doc
+
 ## Prerequiste
+* A video/graphics card that supports OpenGL.
+### Windows
+* C++ ms-compiler for Windows
+### Linux
+* GCC compiler suite.
 
 ## Build
+### Windows
+On windows, write commands :
+```batch
+	git clone https://github.com/anulax/bakara
+	git submodule init
+	git submodule update
+	.\vendor\premake5 vs2022
+	dotnet build
+	dotnet run
+```
+Or use visual studio 2022 to build your project.
+### Linux
+---
+On linux (if you don't have premake5, install it with your distro's packet manager). You have two env variable to change build proccess :
+
+| Name        | Value	    |
+| ----------- | ----------- |
+| autoexec    | 0/1         |
+| clearbin    | 0/1         |
+
+Then write commands :
+```bash
+	git clone https://github.com/anulax/bakara
+	git submodule init
+	git submodule update
+	(export clearbin=1 autoexec=1)
+	./build.sh config=release
+```
 
-## Generate documentation
+## Getting started
+(to do)