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/inc.js

@@ -0,0 +1,21 @@
+'use strict'
+
+const SemVer = require('../classes/semver')
+
+const inc = (version, release, options, identifier, identifierBase) => {
+  if (typeof (options) === 'string') {
+    identifierBase = identifier
+    identifier = options
+    options = undefined
+  }
+
+  try {
+    return new SemVer(
+      version instanceof SemVer ? version.version : version,
+      options
+    ).inc(release, identifier, identifierBase).version
+  } catch (er) {
+    return null
+  }
+}
+module.exports = inc