Specify `THEME=yourtheme`, add some HTML files in `capsulflask/theme/yourtheme` 👌
We probably want to reduce copypasta in the current `yolocolo` theme by using template inheritance, at some point.
Reviewed-on: 3wordchant/capsul-flask#7
Co-authored-by: 3wordchant <3wordchant@noreply.git.autonomic.zone>
Co-committed-by: 3wordchant <3wordchant@noreply.git.autonomic.zone>
