Incorporate location feedback into the live site

[danvk]

Corrections currently get submitted into a Google sheet.

We'd like to have our API server:

• Load this data from the spreadsheet every ~10 minutes
• Populate a database with it
• Merge the data from images.geojson and the new database for our two API calls

This way user corrections will be live until we incorporate them into images.geojson, which will be a much better experience for users.