build: add api server config loader

server-rs/apps/api-server/src/main.rs

@@ -1,19 +1,19 @@
 mod app;
+mod config;
 mod state;
 
-use std::net::SocketAddr;
-
 use tokio::net::TcpListener;
 
-use crate::{app::build_router, state::AppState};
+use crate::{app::build_router, config::AppConfig, state::AppState};
 
 #[tokio::main]
 async fn main() -> Result<(), std::io::Error> {
-    // 当前阶段先用固定地址启动最小骨架，后续再切到统一配置加载。
-    let bind_address = SocketAddr::from(([127, 0, 0, 1], 3000));
+    // 统一先从配置对象读取监听地址，避免后续把环境变量读取散落到入口和路由层。
+    let config = AppConfig::from_env();
+    let bind_address = config.bind_socket_addr();
     let listener = TcpListener::bind(bind_address).await?;
 
-    let state = AppState::new();
+    let state = AppState::new(config);
     let router = build_router(state);
 
     axum::serve(listener, router).await