add tailwind config

Author: solygambas

playground/tailwind-jit/README.md

@@ -5,6 +5,7 @@ A quick intro to Tailwind Just in Time compiler.
 ## Features
 
 - setting up Tailwind CSS with npx commands.
-- generating on-demand CSS with Tailwind for better performance during development.
+- generating on-demand CSS during development with --JIT, --purge and --watch flags.
+- creating a custom tailwind.config.js file.
 
 Based on [Tailwind Just in Time Tutorial](https://www.youtube.com/playlist?list=PL4cUxeGkcC9ht1OMQPhBVKAb2dVLhg-MJ) by Shaun Pelling - The Net Ninja (2021).