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/micromark/lib/initialize/text.d.ts

@@ -0,0 +1,8 @@
+export namespace resolver {
+    let resolveAll: Resolver;
+}
+export const string: InitialConstruct;
+export const text: InitialConstruct;
+import type { Resolver } from 'micromark-util-types';
+import type { InitialConstruct } from 'micromark-util-types';
+//# sourceMappingURL=text.d.ts.map