Run a Glitch site with Apcache

I would like to use server side includes as explained here:

I’ve already asked about this in another topic on Coding Help but I couldn’t get information on how to do it.

It was explained to me that I could use Apcache to use server-side includes on Glitch but Glitch doesn’t support Apcache by default.

Can anyone explain to me how to run Apcache on a Glitch site?