Fix proxy default: use cvfs-backend:8080 instead of localhost:9812

API_BASE_URL env var isn't reaching Next.js in Dokploy, so the fallback
was localhost:9812. Default to the correct container hostname so it works
without any env var configuration. Local dev still overrides via API_BASE_URL.

https://claude.ai/code/session_01Xmxm2QLgFBgRJyYD6VukR6

apps/webapp/next.config.ts

@@ -4,7 +4,9 @@ import path from "node:path";
 const nextConfig: NextConfig = {
   outputFileTracingRoot: path.join(process.cwd(), "../.."),
   async rewrites() {
-    const backend = process.env.API_BASE_URL ?? "http://localhost:9812";
+    // In Docker (Dokploy/compose) the backend container is always reachable at cvfs-backend:8080.
+    // Override with API_BASE_URL for local dev (e.g. http://localhost:9812).
+    const backend = process.env.API_BASE_URL ?? "http://cvfs-backend:8080";
     return [{ source: "/api/:path*", destination: `${backend}/api/:path*` }];
   },
 };