Caddy & New Smartthings Integration

Hi there,

i have my hass.io available from the Internet using the DuckDNS addon and a caddy “reverse proxy?” so i can access several things like nodered directly from the same URL.
i.e.: http://xx.duckdns.org/nodered/

However, when i want to connect the new Smartthings integration, i always get an error message. In the help section it mentions that it can have some troubles with nginx so I figur the same might be true for caddy. But im not sure what to add to my Caddy file to make Smartthings be able to connect to my Home Assistant.

So basically… my question is:

Does anybody use the new Smartthings Integration with Hassio and Caddy?
If so, could you please share your “redacted” caddyfile?