add a README

README.md

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+# node-js-sample
+
+This is a barebones Node.js app using the [Express](http://expressjs.com/) framework.
+
+## Running Locally
+
+Asumming you have [Node.js](http://nodejs.org/) and [Heroku Toolbelt](https://toolbelt.heroku.com/) installed on your machine:
+
+```sh
+git clone git@github.com:heroku/node-js-sample.git # or clone your own fork
+cd node-js-sample
+npm install
+foreman start
+```
+
+Your app should now be running on [localhost:5000](http://localhost:5000/).
+
+## Deploying to Heroku
+
+```
+heroku create
+git push heroku master
+heroku open
+```