Set up basic axum server

src/main.rs

@@ -0,0 +1,23 @@
+use axum::{routing::get, Router};
+use clap::Parser;
+use tokio::net::TcpListener;
+
+#[derive(Parser)]
+struct Args {
+    addr: String,
+}
+
+async fn root() -> &'static str {
+    "Hello world!"
+}
+
+#[tokio::main]
+async fn main() -> anyhow::Result<()> {
+    let args = Args::parse();
+
+    let app = Router::<()>::new().route("/", get(root));
+    let listener = TcpListener::bind(args.addr).await?;
+    axum::serve(listener, app).await?;
+
+    Ok(())
+}