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/astro/dist/cli/sync/index.d.ts

@@ -0,0 +1,6 @@
+import { type Flags } from '../flags.js';
+interface SyncOptions {
+    flags: Flags;
+}
+export declare function sync({ flags }: SyncOptions): Promise<0 | undefined>;
+export {};

node_modules/astro/dist/cli/sync/index.js

@@ -0,0 +1,23 @@
+import { printHelp } from "../../core/messages.js";
+import _sync from "../../core/sync/index.js";
+import { flagsToAstroInlineConfig } from "../flags.js";
+async function sync({ flags }) {
+  if (flags?.help || flags?.h) {
+    printHelp({
+      commandName: "astro sync",
+      usage: "[...flags]",
+      tables: {
+        Flags: [
+          ["--force", "Clear the content layer cache, forcing a full rebuild."],
+          ["--help (-h)", "See all available flags."]
+        ]
+      },
+      description: `Generates TypeScript types for all Astro modules.`
+    });
+    return 0;
+  }
+  await _sync(flagsToAstroInlineConfig(flags), { telemetry: true });
+}
+export {
+  sync
+};