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/css-tree/cjs/syntax/node/LayerName.cjs

@@ -0,0 +1,34 @@
+'use strict';
+
+const types = require('../../tokenizer/types.cjs');
+
+const FULLSTOP = 0x002E; // U+002E FULL STOP (.)
+
+const name = 'LayerName';
+const structure = {
+    name: String
+};
+
+function parse() {
+    let name = this.consume(types.Ident);
+
+    while (this.isDelim(FULLSTOP)) {
+        this.eat(types.Delim);
+        name += '.' + this.consume(types.Ident);
+    }
+
+    return {
+        type: 'LayerName',
+        loc: this.getLocation(this.tokenStart, this.tokenEnd),
+        name
+    };
+}
+
+function generate(node) {
+    this.tokenize(node.name);
+}
+
+exports.generate = generate;
+exports.name = name;
+exports.parse = parse;
+exports.structure = structure;