Add repo description and basic installation guidance

Author: Sean Katz

README.md

@@ -1 +1,23 @@
+# Welcome to Lava Docs 📕
+This repository contains documentation for Lava.
+The source is generated to [Lava Docs website](https://docs.lavanet.xyz/), but can also be browsed as plain source in the [Docs folder](/docs/).
+
+## Installation
+```
+$ yarn install
+```
+Local Development
+```
+$ yarn start
+```
+Build
+```
+$ yarn build
+```
+Deployment:
+If you are using GitHub pages for hosting, this command is a convenient way to build the website and push to the `gh-pages` branch.
+
+```
+$ GIT_USER=<Your GitHub username> yarn deploy
+```