Gracefully shutdown on CTRL+C and SIGTERM

Fixes redlib-org#205

src/server.rs

@@ -1,5 +1,7 @@
 #![allow(dead_code)]
 
+use tokio::signal::unix::{signal, SignalKind};
+
 use brotli::enc::{BrotliCompress, BrotliEncoderParams};
 use cached::proc_macro::cached;
 use cookie::Cookie;
@@ -267,8 +269,13 @@ impl Server {
 
 		// Bind server to address specified above. Gracefully shut down if CTRL+C is pressed
 		let server = HyperServer::bind(address).serve(make_svc).with_graceful_shutdown(async {
-			// Wait for the CTRL+C signal
-			tokio::signal::ctrl_c().await.expect("Failed to install CTRL+C signal handler");
+			// Wait for the CTRL+C or SIGTERM
+			let mut signal_terminate = signal(SignalKind::terminate()).expect("Failed to install SIGTERM signal handler");
+
+			tokio::select! {
+				_ = signal_terminate.recv() => (),
+				_ = tokio::signal::ctrl_c() => ()
+			}
 		});
 
 		server.boxed()