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/actions/loadActions.d.ts

@@ -0,0 +1,8 @@
+import type { SSRActions } from '../core/app/types.js';
+import type { ModuleLoader } from '../core/module-loader/index.js';
+/**
+ * It accepts a module loader and the astro settings, and it attempts to load the middlewares defined in the configuration.
+ *
+ * If not middlewares were not set, the function returns an empty array.
+ */
+export declare function loadActions(moduleLoader: ModuleLoader): Promise<SSRActions>;