Hosting ML model online and training ML model automatically

[DennisvHest]

• Static file host for trained ML model, so this can be easily updated without updating the MapMaven application.
• Being able to trigger a training of a new model. (automatically fetching ScoreSaber scores, feeding and training on data, uploads model)
• Also hosting the PP curve (ScoreSaber and Beatleader) as JSON.

[DennisvHest]

Done except for a trigger to train a new model. Not as simple and cheap as thought.