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/parsers/set.js

@@ -0,0 +1,20 @@
+import { setResponseValueAndErrors } from "../errorMessages.js";
+import { parseDef } from "../parseDef.js";
+export function parseSetDef(def, refs) {
+    const items = parseDef(def.valueType._def, {
+        ...refs,
+        currentPath: [...refs.currentPath, "items"],
+    });
+    const schema = {
+        type: "array",
+        uniqueItems: true,
+        items,
+    };
+    if (def.minSize) {
+        setResponseValueAndErrors(schema, "minItems", def.minSize.value, def.minSize.message, refs);
+    }
+    if (def.maxSize) {
+        setResponseValueAndErrors(schema, "maxItems", def.maxSize.value, def.maxSize.message, refs);
+    }
+    return schema;
+}