adding gitpod to simplify code contributions & automate the dev setup.

.gitpod.yml

@@ -0,0 +1,6 @@
+tasks:
+  - init: npm install
+    command: npm run start
+ports: 
+  - port: 3000
+    onOpen: open-preview

CONTRIBUTING.md

@@ -33,6 +33,18 @@ Please update the [docs](README.md) accordingly so that there are no discrepanci
 
 Please don't include changes to `dist/` in your pull request. This should only be updated when releasing a new version.
 
+### Online one-click setup for contributing
+
+You can use Gitpod (a free online VS Code-like IDE) for contributing. With a single click, it'll launch a workspace and automatically:
+
+- clone the axios repo.
+- install the dependencies.
+- run `npm start`.
+
+So that you can start straight away.
+
+[![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/axios/axios)
+
 ### Releasing
 
 Releasing a new version is mostly automated. For now the [CHANGELOG](https://github.com/axios/axios/blob/master/CHANGELOG.md) requires being updated manually. Once this has been done run the commands below. Versions should follow [semantic versioning](http://semver.org/).

README.md

@@ -2,6 +2,7 @@
 
 [![npm version](https://img.shields.io/npm/v/axios.svg?style=flat-square)](https://www.npmjs.org/package/axios)
 [![build status](https://img.shields.io/travis/axios/axios/master.svg?style=flat-square)](https://travis-ci.org/axios/axios)
+[![Gitpod Ready-to-Code](https://img.shields.io/badge/Gitpod-Ready--to--Code-blue?logo=gitpod)](https://gitpod.io/#https://github.com/axios/axios) 
 [![code coverage](https://img.shields.io/coveralls/mzabriskie/axios.svg?style=flat-square)](https://coveralls.io/r/mzabriskie/axios)
 [![install size](https://packagephobia.now.sh/badge?p=axios)](https://packagephobia.now.sh/result?p=axios)
 [![npm downloads](https://img.shields.io/npm/dm/axios.svg?style=flat-square)](http://npm-stat.com/charts.html?package=axios)