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/prompts/dist/dateparts/hours.js

@@ -0,0 +1,30 @@
+'use strict';
+
+const DatePart = require('./datepart');
+
+class Hours extends DatePart {
+  constructor(opts = {}) {
+    super(opts);
+  }
+
+  up() {
+    this.date.setHours(this.date.getHours() + 1);
+  }
+
+  down() {
+    this.date.setHours(this.date.getHours() - 1);
+  }
+
+  setTo(val) {
+    this.date.setHours(parseInt(val.substr(-2)));
+  }
+
+  toString() {
+    let hours = this.date.getHours();
+    if (/h/.test(this.token)) hours = hours % 12 || 12;
+    return this.token.length > 1 ? String(hours).padStart(2, '0') : hours;
+  }
+
+}
+
+module.exports = Hours;