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/preferences/defaults.js

@@ -0,0 +1,18 @@
+const DEFAULT_PREFERENCES = {
+  devToolbar: {
+    /** Specifies whether the user has the Dev Overlay enabled */
+    enabled: true
+  },
+  checkUpdates: {
+    /** Specifies whether the user has the update check enabled */
+    enabled: true
+  },
+  // Temporary variables that shouldn't be exposed to the users in the CLI, but are still useful to store in preferences
+  _variables: {
+    /** Time since last update check */
+    lastUpdateCheck: 0
+  }
+};
+export {
+  DEFAULT_PREFERENCES
+};