Fixed PostCSS and Tailwind issues

Author: w3bdesign

nuxt.config.js

@@ -38,6 +38,7 @@ export default {
   buildModules: [
     // https://go.nuxtjs.dev/eslint
     '@nuxtjs/eslint-module',
+    '@nuxt/postcss8',
     // https://go.nuxtjs.dev/tailwindcss
     '@nuxtjs/tailwindcss',
   ],