Added readme and wrote about webpack

README.md

@@ -0,0 +1,16 @@
+# UNO game written in JavaScript
+
+
+## For developers
+
+### Install webpack
+This repo is compiled with `webpack`. So, first install webpack by
+```
+npm install webpack webpack-cli
+```
+
+### Use webpack
+```
+npx webpack
+```
+This command will generate `dist/main.js`