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/zod-to-json-schema/dist/cjs/parsers/readonly.js

@@ -0,0 +1,8 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.parseReadonlyDef = void 0;
+const parseDef_js_1 = require("../parseDef.js");
+const parseReadonlyDef = (def, refs) => {
+    return (0, parseDef_js_1.parseDef)(def.innerType._def, refs);
+};
+exports.parseReadonlyDef = parseReadonlyDef;