Feature/add sdk package

.gitignore

@@ -5,4 +5,4 @@ api/.env
 api/sig
 .tags
 
-cli/dist
+dist

sdk/README.md

@@ -0,0 +1,55 @@
+<p align="center">
+  <a href="https://iex.ec/" rel="noopener" target="_blank"><img width="150" src="./logo-iexec.png" alt="iExec logo"/></a>
+</p>
+
+<h1 align="center">iApp</h1>
+
+**iApp** offers developers methods to manage and run an iExec iApp.
+
+<div align="center">
+
+[![npm](https://img.shields.io/npm/v/@mage-sombre/iapp)](https://www.npmjs.com/package/@mage-sombre/iapp)[![license](https://img.shields.io/badge/license-Apache%202-blue)](/LICENSE)
+
+</div>
+
+## Installation
+
+Web3mail is available as an [npm package](https://www.npmjs.com/package/@mage-sombre/iapp).
+
+**npm:**
+
+```sh
+npm install @mage-sombre/iapp
+```
+
+**yarn:**
+
+```sh
+yarn add @mage-sombre/iapp
+```
+
+## Get started
+
+### Browser
+
+```ts
+import { IExecIApp } from "@mage-sombre/iapp";
+
+const web3Provider = window.ethereum;
+const iapp=IExecIApp(web3Provider);
+```
+
+### NodeJS
+
+```ts
+import { IExecIApp, getWeb3Provider } from "@mage-sombre/iapp";
+
+const { PRIVATE_KEY } = process.env; 
+
+const web3Provider = getWeb3Provider(PRIVATE_KEY);
+const iapp =IExecIApp(web3Provider);
+```
+
+## License
+
+This project is licensed under the terms of the [Apache 2.0](/LICENSE).