Set postgres url from env

Author: paulocsanz

src/main.rs

@@ -37,7 +37,8 @@ async fn main() {
         .with(tracing_subscriber::fmt::layer())
         .init();
 
-    let url = "postgres://postgres:postgres@127.0.0.1:5432/iop";
+    let url = std::env::var("POSTGRES_URL")
+        .unwrap_or_else(|| "postgres://postgres:postgres@127.0.0.1:5432/iop".to_owned());
     let pool = Pool::connect(url)
         .await
         .expect("Unable to connect to database");