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/IdSelector.cjs

@@ -0,0 +1,33 @@
+'use strict';
+
+const types = require('../../tokenizer/types.cjs');
+
+const name = 'IdSelector';
+const structure = {
+    name: String
+};
+
+function parse() {
+    const start = this.tokenStart;
+
+    // TODO: check value is an ident
+    this.eat(types.Hash);
+
+    return {
+        type: 'IdSelector',
+        loc: this.getLocation(start, this.tokenStart),
+        name: this.substrToCursor(start + 1)
+    };
+}
+
+function generate(node) {
+    // Using Delim instead of Hash is a hack to avoid for a whitespace between ident and id-selector
+    // in safe mode (e.g. "a#id"), because IE11 doesn't allow a sequence <ident-token> <hash-token>
+    // without a whitespace in values (e.g. "1px solid#000")
+    this.token(types.Delim, '#' + node.name);
+}
+
+exports.generate = generate;
+exports.name = name;
+exports.parse = parse;
+exports.structure = structure;