fix: add API proxy via Next rewrites + fix hardcoded localhost URLs

front-end-dash.aggios.app/next.config.ts

@@ -4,6 +4,16 @@ const nextConfig: NextConfig = {
   experimental: {
     externalDir: true,
   },
+  async rewrites() {
+    return {
+      beforeFiles: [
+        {
+          source: "/api/:path*",
+          destination: "http://backend:8080/api/:path*",
+        },
+      ],
+    };
+  },
 };
 
 export default nextConfig;