add max idle timeout to fix go-sql-driver/mysql#257

Author: shusson

docker/docker-compose.yml

@@ -17,5 +17,5 @@ services:
     restart: always
     ports:
       - "8080:8080"
-    image: shusson/variantstore:1.4
+    image: shusson/variantstore:1.5
     entrypoint: 'go-wrapper run -d "${MYSQL_ROOT_USER}:${MYSQL_ROOT_PASSWORD}@tcp(db:${MYSQL_ROOT_PORT})/variants"'

variantstore.go

@@ -90,6 +90,7 @@ func main() {
 		})
 	check(err)
 	fmt.Println("Connected to mysql server")
+	db.SetConnMaxLifetime(10 * time.Second)
 	if connectionCheck {
 		return
 	}