Updated README to Markdown

README.md

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+# Air Hockey
+A simple browser-based air hockey game using socket.io with Electron desktop client
+
+## Development Environment
+node 8.9.4
+npm 5.7.1
+Tested on MacOS 10.13.2
+
+## Dependencies
+node.js, Electron, socket.io
+
+# Installation Instructions
+..* Clone to local machine
+..* Run _npm install_ from root directory and Electron Client directory to install node module Dependencies
+
+# Running the App
+## Starting the server
+..* Execute _node app.js_ from root directory to start the app server
+
+## Browser Client
+..* Navigate to http://localhost:3000/airhockey.html from your browser
+
+## Electron Client
+..* Execute _npm start_ from inside the _Electron Client_ directory to launch the Electron Client