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/content/index.js

@@ -0,0 +1,15 @@
+import { attachContentServerListeners } from "./server-listeners.js";
+import { createContentTypesGenerator } from "./types-generator.js";
+import { getContentPaths, hasAssetPropagationFlag } from "./utils.js";
+import { astroContentAssetPropagationPlugin } from "./vite-plugin-content-assets.js";
+import { astroContentImportPlugin } from "./vite-plugin-content-imports.js";
+import { astroContentVirtualModPlugin } from "./vite-plugin-content-virtual-mod.js";
+export {
+  astroContentAssetPropagationPlugin,
+  astroContentImportPlugin,
+  astroContentVirtualModPlugin,
+  attachContentServerListeners,
+  createContentTypesGenerator,
+  getContentPaths,
+  hasAssetPropagationFlag
+};