added back readme file

README.md

@@ -0,0 +1,21 @@
+# ais-ecommerce-demo-app
+
+_This project was generated with [create-instantsearch-app](https://github.com/algolia/instantsearch/tree/master/packages/create-instantsearch-app) by [Algolia](https://algolia.com)._
+
+## Get started
+
+To run this project locally, install the dependencies and run the local server:
+
+```sh
+npm install
+npm start
+```
+
+Alternatively, you may use [Yarn](https://http://yarnpkg.com/):
+
+```sh
+yarn
+yarn start
+```
+
+Open http://localhost:3000 to see your app.