Add dark theme to syncthing docs #10533
Description
Feature description
It would be great if the docs provided a toggle to switch to a dark theme.
Problem or use case
https://docs.syncthing.net/v2.0.0/ is very bright at night, it would be great if the docs provided a toggle to switch to a dark theme.
Alternatives or workarounds
Use an style editor in the browser, works but not optimal.