refactor: split routes into multiple files

src/main.rs

@@ -1,6 +1,8 @@
-use axum::{routing::get, Router};
+use axum::Router;
 use clap::Parser;
 
+mod routes;
+
 #[derive(Debug, Parser)]
 #[command(author, version, about)]
 struct Args {
@@ -13,7 +15,7 @@ struct Args {
 #[tokio::main]
 async fn main() {
     let args = Args::parse();
-    let app = Router::new().route("/", get(|| async { "Hello, world!" }));
+    let app = Router::new().nest("/", routes::router());
 
     let listener = tokio::net::TcpListener::bind((args.host, args.port)).await.unwrap();
     axum::serve(listener, app).await.unwrap();

src/routes/healthcheck.rs

@@ -0,0 +1,5 @@
+use axum::{routing::get, Router};
+
+pub fn router() -> Router {
+    Router::new().route("/", get(|| async {"Ok"}))
+}

src/routes/mod.rs

@@ -0,0 +1,7 @@
+use axum::Router;
+
+mod healthcheck;
+
+pub fn router() -> Router {
+    Router::new().nest("/healthcheck", healthcheck::router())
+}