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/deterministic-object-hash/dist/encoders.d.ts

@@ -0,0 +1,6 @@
+export declare const encoders: {
+    base64: (input: ArrayBuffer) => string;
+    base64url: (input: ArrayBuffer) => string;
+    hex: (input: ArrayBuffer) => string;
+    binary: (input: ArrayBuffer) => string;
+};