Update readme

README.md

@@ -4,10 +4,20 @@ This is a part of The Mine Sweeper Challenge !
 
 The challenge consist of making this game in different ways.
 
-* [ ] Javascript (Vanilla)
+* [x] Javascript (Vanilla)
 * [ ] React
 * [ ] Angular
 * [ ] Vue
 * [ ] Unity (C#)
 
 More Info soon.
+
+# Usage
+
+_Note: I will, in the future, add it into my own website._
+
+1.  Clone the repo
+2.  Install node dependency
+3.  Use in terminal : `npm run build`
+4.  Play it using the files in `dist/`
+5.  Have fun !