restructured, added db connection pool

src/main.rs

@@ -1,9 +1,15 @@
 use std::net::TcpListener;
-
-use zero2prod::run;
+use sqlx::postgres::PgPoolOptions;
+use zero2prod::configuration::get_configuration;
+use zero2prod::startup::run;
 
 #[tokio::main]
 async fn main() -> std::io::Result<()> {
-	let listener = TcpListener::bind("127.0.0.1:8000").expect("Failed to bind random port");
-	run(listener)?.await
+    let config = get_configuration().expect("Failed to read configuration");
+	let connection = PgPoolOptions::new()
+    .max_connections(10).connect(&config.database.connection_string()).await.expect("Failed to connect to Postgres.");
+
+    let address = format!("127.0.0.1:{}", config.application_port);
+    let listener = TcpListener::bind(address).expect("Failed to bind random port");
+    run(listener, connection)?.await
 }