Query Map Layers periodically and save in Mongo DB

[denisesenguel]

• [ ] Get airports and airspaces data from OpenAIP API
• [ ] Save only relevant (filter in backend!)
• [ ] Update every day - for now on request: if data is older, fetch new
• [ ] Expose data on new endpoint(s)

[denisesenguel]

Should be done in a separate DB/API (if necessary at all)