Temporary fix to ping_flash2 problem (#87) by using api to generate pong

At least until a reliable central API can be set up, we can send a request to the spotlite server to generate the pong. Once we have an api up and running, it's just a matter of changing the url of the http request.
This should be `"http://78.47.194.46:8080/" + input`, did you ever try the code?