Image Generation via request only

[mro63]

Hi,
I would like to use your tool for creating screenshots of my lovelace dashboards on demand and not triggered via CRON.
Is there an endpoint (for an http request) available to trigger the rendering? I couldn't find something like this in your code.
There is a fork available to do that, but I haven't figured out how to use that code as an addon on HA OS.
Since yours is easily integrated like this, it would be nice to have that kind of feature as well!