fix: Fix product page syntax errors

1. Remove duplicate/broken code in product tables section
2. Fix PostCSS config for Tailwind 4
3. Add @tailwindcss/postcss dependency
4. Remove --production flag from Dockerfile (sharp required)

All fixes enable successful Docker build with favicon working.

node_modules/hastscript/index.js

@@ -0,0 +1,7 @@
+/**
+ * @typedef {import('./lib/create-h.js').Child} Child
+ * @typedef {import('./lib/create-h.js').Properties} Properties
+ * @typedef {import('./lib/create-h.js').Result} Result
+ */
+
+export {h, s} from './lib/index.js'