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/enhanced-resolve/lib/TryNextPlugin.js

@@ -0,0 +1,41 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+/** @typedef {import("./Resolver")} Resolver */
+/** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */
+
+module.exports = class TryNextPlugin {
+	/**
+	 * @param {string | ResolveStepHook} source source
+	 * @param {string} message message
+	 * @param {string | ResolveStepHook} target target
+	 */
+	constructor(source, message, target) {
+		this.source = source;
+		this.message = message;
+		this.target = target;
+	}
+
+	/**
+	 * @param {Resolver} resolver the resolver
+	 * @returns {void}
+	 */
+	apply(resolver) {
+		const target = resolver.ensureHook(this.target);
+		resolver
+			.getHook(this.source)
+			.tapAsync("TryNextPlugin", (request, resolveContext, callback) => {
+				resolver.doResolve(
+					target,
+					request,
+					this.message,
+					resolveContext,
+					callback,
+				);
+			});
+	}
+};