added clap to configure port and interfaces, and fixed nixos module

src/main.rs

@@ -1,4 +1,5 @@
 use axum::{Router, routing::get};
+use clap::Parser;
 use lazy_static::lazy_static;
 use std::sync::Arc;
 use tera::Tera;
@@ -20,12 +21,30 @@ lazy_static! {
     };
 }
 
+#[derive(clap::Parser, Debug)]
+#[command(author, version, about, long_about = None)]
+pub struct Cli {
+    /// Port to serve on
+    #[arg(short, long, default_value = "8000")]
+    port: String,
+
+    /// Whether to listen on 0.0.0.0
+    #[arg(short, long)]
+    host: bool,
+
+    /// Verbose mode
+    #[arg(short, long)]
+    verbose: bool,
+}
+
 struct AppState {
     app_name: String,
 }
 
 #[tokio::main]
 async fn main() -> anyhow::Result<()> {
+    let cli = Cli::parse();
+
     tracing_subscriber::fmt()
         .with_max_level(tracing::Level::INFO)
         .init();
@@ -39,12 +58,10 @@ async fn main() -> anyhow::Result<()> {
         .route("/showcase", get(showcase_handler))
         .with_state(shared_state);
 
-    let host = false;
-    let port = "8000";
-    let addr = if host {
-        format!("0.0.0.0:{}", port)
+    let addr = if cli.host {
+        format!("0.0.0.0:{}", cli.port)
     } else {
-        format!("127.0.0.1:{}", port)
+        format!("127.0.0.1:{}", cli.port)
     };
 
     let listener = tokio::net::TcpListener::bind(&addr).await?;