Ringo sandboxes

Open a sandbox at https://ringo-sandbox-bah7gweubuecfcct.z03.azurefd.net/{sandbox_id}/{sandbox-slug}.

Restored from archive: https://ringo-sandbox-bah7gweubuecfcct.z03.azurefd.net/archive/{archive_id}/{sandbox-slug}.

For local dev, use the same path segments on the bare host (or ?slug= on /_lobby/status).