docs: Add a README to vuepress package (close: #1908)(#1912)

Fixed #1908.

packages/vuepress/README.md

@@ -0,0 +1,48 @@
+<p align="center">
+  <a href="https://vuepress.vuejs.org/" target="_blank">
+    <img width="180" src="https://raw.githubusercontent.com/vuejs/vuepress/master/packages/docs/docs/.vuepress/public/hero.png" alt="logo">
+  </a>
+</p>
+
+<p align="center">
+  <a href="https://npmcharts.com/compare/vuepress?minimal=true"><a href="https://opencollective.com/vuepress" alt="Financial Contributors on Open Collective"><img src="https://opencollective.com/vuepress/all/badge.svg?label=financial+contributors" /></a> <img src="https://img.shields.io/npm/dm/vuepress.svg" alt="Downloads"></a>
+  <a href="https://www.npmjs.com/package/vuepress"><img src="https://img.shields.io/npm/v/vuepress.svg" alt="Version"></a>
+  <a href="https://github.com/vuejs/vuepress/blob/master/LICENSE"><img src="https://img.shields.io/npm/l/vuepress.svg" alt="License"></a>
+  <a href="https://discordapp.com/invite/HBherRA"><img src="https://img.shields.io/badge/Discord-join%20chat-738bd7.svg" alt="vuepress channel on Discord"></a>
+</p>
+
+# Vuepress
+
+:memo: Minimalistic Vue-powered static site generator
+
+## Installation
+
+Use the package manager [yarn](https://yarnpkg.com/) to install vuepress as a dev dependency.
+
+```bash
+yarn add vuepress -D
+```
+
+## Documentation
+
+The docs are available at <https://vuepress.vuejs.org>
+
+## Contributing
+
+Want to contribute? Check our [issues for beginners](https://github.com/vuejs/vuepress/issues?q=is%3Aopen+is%3Aissue+label%3A%22good+first+issue%22)!
+
+```bash
+yarn bootstrap # Install and link dependencies for this lerna repo
+yarn dev  # serves VuePress' own docs with itself
+yarn test # make sure your code change pass the test
+```
+
+If you don't have a local checkout, you can also open [VuePress in Gitpod](https://gitpod.io/#https://github.com/vuejs/vuepress/blob/master/packages/docs/docs/README.md), a free online IDE for GitHub.
+
+If you intend to make `"substantial"` changes to VuePress or its documentation, please checkout [VuePress RFCs](./rfcs/README.md).
+
+If you have a VuePress-related project/component/tool, add it with a pull request to [this curated list](https://github.com/ulivz/awesome-vuepress)!
+
+## License
+
+[MIT](https://github.com/vuejs/vuepress/blob/master/LICENSE)