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/semver/functions/sort.js

@@ -0,0 +1,5 @@
+'use strict'
+
+const compareBuild = require('./compare-build')
+const sort = (list, loose) => list.sort((a, b) => compareBuild(a, b, loose))
+module.exports = sort