i use very often the Proxy function for a Domain, which is very easy and perfect. I might be a little bit better, if there can be an option to force proxy over https.
<original.de> connected to IMSCP and set as Proxy to <http://dev.website.de> (where the content is located such as Wordpress)
On the <dev.website.de> i have no chance to force to https, because always http.
Thanks a lot for reading