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/v4/classic/coerce.js

@@ -0,0 +1,17 @@
+import * as core from "../core/index.js";
+import * as schemas from "./schemas.js";
+export function string(params) {
+    return core._coercedString(schemas.ZodString, params);
+}
+export function number(params) {
+    return core._coercedNumber(schemas.ZodNumber, params);
+}
+export function boolean(params) {
+    return core._coercedBoolean(schemas.ZodBoolean, params);
+}
+export function bigint(params) {
+    return core._coercedBigint(schemas.ZodBigInt, params);
+}
+export function date(params) {
+    return core._coercedDate(schemas.ZodDate, params);
+}