Fix first build not having any CSS

Tailwind is able to pick up changes faster since it doesn't need to wait
for JS to be transpiled. But most importantly is the improved developer
experience, avoiding a website without CSS the first time `npm run dev`
is run.

tailwind.config.js

@@ -1,8 +1,9 @@
 const defaultTheme = require('tailwindcss/defaultTheme')
 
 module.exports = {
-  // in prod look at shadow-cljs output file in dev look at runtime, which will change files that are actually compiled; postcss watch should be a whole lot faster
-  content: process.env.NODE_ENV == 'production' ? ["./public/js/main.js"] : ["./public/js/cljs-runtime/*.js"],
+  content: [
+    "./src/main/**/*.cljs"
+  ],
   theme: {
     extend: {
       fontFamily: {