add initial support for tailwindcss (#134)

Add support for and demo using tailwindcss

postcss.config.js

@@ -0,0 +1,6 @@
+const tailwindcss = require('tailwindcss');
+const autoprefixer = require('autoprefixer');
+
+module.exports = {
+  plugins: ['postcss-preset-env', tailwindcss, autoprefixer],
+};