Convert landscape app to static website

Proposal:

Convert the landscape app to generate a static website (client-side scripting only). Currently, the app has an API call for filtering the cards shown on the landscape. The API generates a JSON list of objects that is used by the client-side scripts to update what is shown. If this API call is converted to a client-side function, it would make the landscape a static website. (I don't see any other API calls other than the filtering).

Justification:

Static websites are easier to serve using basic web servers (e.g. http-server) and reduce possible attack vectors by eliminating code running on the server. Some organizations require static websites.

Locate the API call used to filter landscape cards and the client-side scripts that consume its JSON response. Check whether any other API calls are present, then verify that filtering works without the API and the landscape can be served as a static website.

Written by the indexing model from the issue text.