hswaw rc3 map

To test:

• install ngrok, python3
• python3 serve.py
• ngrok http 8000

Then, given the ngrok domain (something like deadbeefcafe.ngrok.io), visit the following URL in your browser

https://test.visit.at.wa-test.rc3.cccv.de/_/global/deadbeefcafe.ngrok.io/hswaw.json