refactor: remove tokio TcpListener and simplify address setup

- Replaced `tokio::net::TcpListener` with direct `SocketAddr` setup.
- Simplified server address configuration while maintaining functionality.
- Reduced unnecessary dependencies for cleaner API handling.

src/api.rs

@@ -9,7 +9,6 @@ use axum::{
 };
 use serde::{Deserialize, Serialize};
 use std::sync::Arc;
-use tokio::net::TcpListener;
 use tracing::{info, error, debug, instrument};
 
 use crate::document_service::{Document, DocumentService, SignatureVerification};
@@ -106,12 +105,8 @@ pub async fn start_api(
 
     info!("API routes configured");
 
-    // Start server
-    let listener = TcpListener::bind(format!("0.0.0.0:{}", api_port)).await?;
-    info!("API server started on port {}", api_port);
-
     // Get the socket address
-    let addr = listener.local_addr()?;
+    let addr = std::net::SocketAddr::from(([0, 0, 0, 0], api_port));
 
     // Bind and serve
     info!("Serving API at {}", addr);