sujiko

https://github.com/tutuitakumi/sujiko

Sujiko is a joke / toy Ruby gem: a small TCP server for local development, not for serious or production use. It serves one page: a venue floor plan where a meetup point is shown. Open GET / with optional query parameters shape, x, and y—the same contract as a Rails Spots-style app and iOS: shape selects the room (e.g. roomA, with normalization to internal ids like room_a); x and y are normalized coordinates from 0.0 to 1.0 (top-left of the white floor, independent of device pixels). Use it to preview map UI and to build or verify share URLs (Safari, copy, etc.) before deploying.