Setup cron job for https certificates

[Zethson]

Every 3 months the certificate expires. We should setup a cronjob to automatically renew it.
It should also be added to our setup script.

[Zethson]

Your certificate (or certificates) for the names listed below will expire in 20 days (on 10 Aug 19 18:35 +0000). Please make sure to renew your certificate before then, or visitors to your website will encounter errors.

@Imipenem Do you want to tackle this?

[Imipenem]

Y I´ll take care of it

[Zethson]

@Imipenem I can give you a root account for the VPS.
Or, you can try it on your own and then just update the script here.

[Imipenem]

I´ll try on my own (for my other website); then updating this one