landing page

Returns the root STAC Catalog or STAC Collection that is the entry point for users to browse with STAC Browser or for search engines to crawl. This can either return a single STAC Collection or more commonly a STAC catalog. The landing page provides links to the API definition (link relations `service-desc` and `service-doc`) and the STAC records such as collections/catalogs (link relation `child`) or items (link relation `item`). Extensions may add additional links with new relation types.