Change docker-compose Example file

- implemented command for watching files with gulp.

Author: vs0uz4

docker-compose.yaml.example

@@ -89,6 +89,7 @@ services:
     networks:
       sandbox_net:
         ipv4_address: 192.168.0.6
+    command: gulp watch
     volumes:
       - .:/var/www/app
       - sandbox-config:/home/ambientum/.config