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/lib/syntax/node/Brackets.js

@@ -0,0 +1,35 @@
+import {
+    Delim,
+    LeftSquareBracket,
+    RightSquareBracket
+} from '../../tokenizer/index.js';
+
+export const name = 'Brackets';
+export const structure = {
+    children: [[]]
+};
+
+export function parse(readSequence, recognizer) {
+    const start = this.tokenStart;
+    let children = null;
+
+    this.eat(LeftSquareBracket);
+
+    children = readSequence.call(this, recognizer);
+
+    if (!this.eof) {
+        this.eat(RightSquareBracket);
+    }
+
+    return {
+        type: 'Brackets',
+        loc: this.getLocation(start, this.tokenStart),
+        children
+    };
+}
+
+export function generate(node) {
+    this.token(Delim, '[');
+    this.children(node);
+    this.token(Delim, ']');
+}