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/compare-build.js

@@ -0,0 +1,9 @@
+'use strict'
+
+const SemVer = require('../classes/semver')
+const compareBuild = (a, b, loose) => {
+  const versionA = new SemVer(a, loose)
+  const versionB = new SemVer(b, loose)
+  return versionA.compare(versionB) || versionA.compareBuild(versionB)
+}
+module.exports = compareBuild