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/destr/lib/index.cjs

@@ -0,0 +1,7 @@
+const { destr, safeDestr } = require("../dist/index.cjs");
+
+// Allow mixed default and named exports
+destr.destr = destr;
+destr.safeDestr = safeDestr;
+
+module.exports = destr;