Write the 'getting started' documentation

README.md

@@ -1 +1,20 @@
-# lumino
+# Lumino
+
+## Requirements
+
+This app is built with [React Native](https://facebook.github.io/react-native/) and requires the following stack:
+* [node](https://nodejs.org/)
+* [yarn](https://yarnpkg.com/)
+* [expo](https://expo.io/)
+
+## Getting Started
+
+Go to `lumino/Lumino` and install dependencies by running
+
+        $ yarn
+
+Launch the local server with
+
+        $ yarn start
+
+Then follow the instructions on your terminal.