feat: add deployment artifacts and health endpoints

apps/admin-api/src/main.rs

@@ -1 +1,34 @@
-fn main() {}
+use std::{env, net::SocketAddr};
+
+use axum::{Json, Router, routing::get};
+use serde_json::json;
+use tokio::net::TcpListener;
+use tracing::info;
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    tracing_subscriber::fmt()
+        .with_env_filter(
+            env::var("MCPAAS_LOG_LEVEL")
+                .unwrap_or_else(|_| "admin_api=info,tower_http=info".into()),
+        )
+        .init();
+
+    let bind_addr = env::var("MCPAAS_ADMIN_BIND").unwrap_or_else(|_| "0.0.0.0:3001".into());
+    let socket_addr: SocketAddr = bind_addr.parse()?;
+    let app = Router::new().route("/health", get(health));
+    let listener = TcpListener::bind(socket_addr).await?;
+
+    info!("admin-api listening on {}", socket_addr);
+
+    axum::serve(listener, app).await?;
+
+    Ok(())
+}
+
+async fn health() -> Json<serde_json::Value> {
+    Json(json!({
+        "service": "admin-api",
+        "status": "ok"
+    }))
+}