Added README.md

README.md

+# Ronindojo.io
+
+This project uses [React](https://reactjs.org/docs/getting-started.html) and [Next.js](https://nextjs.org/docs/getting-started).
+
+## System dependencies
+- [Node.js](https://nodejs.org/en/download/) >= v12.x
+- [Yarn](https://classic.yarnpkg.com/en/docs/install) v1.x
+
+## Project dependencies
+
+To install project dependencies, run `yarn install`.
+
+## Development
+
+Development server can be started by running `yarn run dev`.
+A local server will be started on `http://localhost:3000`.
+Every code change will be automatically detected and website will be refreshed automatically.
+
+## Build & export
+
+A static export can be made by running `yarn run build`.
+A folder named `out` will be created with all the static files.