fix: Fixed baked api url

web/next.config.ts

@@ -1,6 +1,11 @@
 import type { NextConfig } from "next";
 
-const apiUrl = process.env.NEXT_PUBLIC_API_URL ?? "http://localhost:8080";
+// Read at runtime, not baked in. The rewrites below run in the Next server
+// process, never in the browser, so this never needed the NEXT_PUBLIC_ prefix
+// that pins a value into the image at build time. NEXT_PUBLIC_API_URL is still
+// honoured so an existing deployment passing it keeps working.
+const apiUrl =
+    process.env.API_URL ?? process.env.NEXT_PUBLIC_API_URL ?? "http://localhost:8080";
 
 const nextConfig: NextConfig = {
     output: "standalone",