Demonstration of possible usage of the GattServer

Dependents:   mbed-os-example-ble-GattServer_ECG

Issue: Not sure how to connect to this

I've compiled and loaded this firmware on the NRF52-DK but I cannot find the device from the NRF Connect tool. As this an example app, would it be possible to include some more information on how to use so that people can understand what's going on more clearly? Thanks.