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/prismjs/components/prism-ejs.js

@@ -0,0 +1,26 @@
+(function (Prism) {
+
+	Prism.languages.ejs = {
+		'delimiter': {
+			pattern: /^<%[-_=]?|[-_]?%>$/,
+			alias: 'punctuation'
+		},
+		'comment': /^#[\s\S]*/,
+		'language-javascript': {
+			pattern: /[\s\S]+/,
+			inside: Prism.languages.javascript
+		}
+	};
+
+	Prism.hooks.add('before-tokenize', function (env) {
+		var ejsPattern = /<%(?!%)[\s\S]+?%>/g;
+		Prism.languages['markup-templating'].buildPlaceholders(env, 'ejs', ejsPattern);
+	});
+
+	Prism.hooks.add('after-tokenize', function (env) {
+		Prism.languages['markup-templating'].tokenizePlaceholders(env, 'ejs');
+	});
+
+	Prism.languages.eta = Prism.languages.ejs;
+
+}(Prism));