Currently hosted on heroku (free) using the puppeteer-heroku-buildpack
https://miceditor-map-preview.herokuapp.com/
Usage (example):
POST https://miceditor-map-preview.herokuapp.com/
Content-Type: application/json
{ "xml": "<C>..." [, "raw": true] [, "width|height": number] }
Response is text/plain with the imgur link or image/png binary with "raw": true