Feature Request: Allow GPX Export to Custom API Endpoints

[khizirsiddiqui]

Currently there are set methods through which the user can connect and send data after the run ends. It would expand the application's compatibility with several different services if the app could send a POST request along with GPX file and meta-data to user-defined web address.
Example service: Workout-Tracker takes a POST request like below

curl -sSL -H "Authorization: bearer your-api-key" \
  http://localhost:8080/api/v1/import/generic \
  --data @path/to/recorded.gpx

Example inputs:
url - http://localhost:8080/api/v1/import/generic
token - your-api-key