Add JSON structured logging

main.go

@@ -27,25 +27,37 @@ func main() {
 		log.Fatal(err)
 	}
 
-	startBot()
+	initLogger()
+
+	err = startBot()
+
+	if err != nil {
+		log.Fatal(err)
+	}
 }
 
-func startBot() {
+func startBot() error {
 	session, _ := discordgo.New("Bot " + *Token)
 
 	err := session.Open()
 	if err != nil {
-		log.Fatalf("could not open session: %s", err)
+		Log.Error("could not open discord session", "type", "error", "error", err)
+		return err
 	}
 
+	Log.Info("shutting down gracefully", "type", "shutdown")
+
 	sigch := make(chan os.Signal, 1)
 	signal.Notify(sigch, os.Interrupt)
 	<-sigch
 
-	log.Printf("shutting down gracefully...")
+	Log.Info("shutting down gracefully", "type", "shutdown")
 
 	err = session.Close()
 	if err != nil {
-		log.Printf("could not close session gracefully: %s", err)
+		Log.Error("could not close discord session gracefully", "type", "error", "error", err)
+		return err
 	}
+
+	return nil
 }