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/esm/errorMessages.js

@@ -0,0 +1,14 @@
+export function addErrorMessage(res, key, errorMessage, refs) {
+    if (!refs?.errorMessages)
+        return;
+    if (errorMessage) {
+        res.errorMessage = {
+            ...res.errorMessage,
+            [key]: errorMessage,
+        };
+    }
+}
+export function setResponseValueAndErrors(res, key, value, errorMessage, refs) {
+    res[key] = value;
+    addErrorMessage(res, key, errorMessage, refs);
+}