feat(runner): implement graceful shutdown

internal/runner/runner.go

@@ -1,9 +1,13 @@
 package runner
 
 import (
+	"context"
 	"fmt"
+	"os"
+	"time"
 
 	"net/http"
+	"os/signal"
 
 	"github.com/charmbracelet/log"
 	"github.com/kitabisa/teler-proxy/common"
@@ -26,7 +30,27 @@ func New(opt *common.Options) error {
 		ErrorLog: logger,
 	}
 
-	log.Info("Server started", "port", opt.Port)
+	sig := make(chan os.Signal, 1)
+	signal.Notify(sig, os.Interrupt)
 
-	return server.ListenAndServe()
+	go func() {
+		<-sig
+		log.Warn("Interuppted. Shutting down...")
+
+		ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+		defer cancel()
+
+		if err := server.Shutdown(ctx); err != nil {
+			log.Fatal("Server shutdown error", "error", err)
+		}
+	}()
+
+	log.Info("Server started", "port", opt.Port, "pid", os.Getpid())
+
+	err = server.ListenAndServe()
+	if err != nil && err != http.ErrServerClosed {
+		return err
+	}
+
+	return nil
 }