📝 Updating README

Creating a `Development` section

README.md

@@ -15,5 +15,6 @@ NOTION_DATABASE_ID=your_database_id
 This project is deployable on vercel.com. Use this button for an easy start:
 
 [![Deploy with Vercel](https://vercel.com/button)](https://vercel.com/new/clone?repository-url=https%3A%2F%2Fgithub.com%2Fpasc4le%2Fnotion-pretty-print.git&env=NOTION_TOKEN,NOTION_DATABASE_ID&envDescription=For%20this%20project%20to%20work%20you%20need%20to%20generate%20your%20own%20Notion%20Integration%20secret%20Token%20and%20you%20should%20get%20your%20database%20id.%20Checkout%20the%20README%20for%20more%20info.&envLink=https%3A%2F%2Fgithub.com%2Fpasc4le%2Fnotion-pretty-print)
-## Project Development
+## Development
+You can run it in development mode via `yarn dev`. It is slow (really slow), because of the real-time "translation" of the Notion's blocks.
 Pull requests are well accepted ☺️