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/config/entrypoint.js

@@ -0,0 +1,27 @@
+import { fontProviders } from "../assets/fonts/providers/index.js";
+import { mergeConfig } from "../core/config/merge.js";
+import { validateConfig } from "../core/config/validate.js";
+import { envField } from "../env/config.js";
+import { defineConfig, getViteConfig } from "./index.js";
+function sharpImageService(config = {}) {
+  return {
+    entrypoint: "astro/assets/services/sharp",
+    config
+  };
+}
+function passthroughImageService() {
+  return {
+    entrypoint: "astro/assets/services/noop",
+    config: {}
+  };
+}
+export {
+  defineConfig,
+  envField,
+  fontProviders,
+  getViteConfig,
+  mergeConfig,
+  passthroughImageService,
+  sharpImageService,
+  validateConfig
+};