It should be noted that “being certain of the environment the pages run” requires controlling the client software being executed which requires preventing the user from modifying said executable which requires the browser to either be closed source or, more effectively, controlling the user's hardware via blackbox verification chips (e.g. TPM DRM). It's not just advertisers that would benefit but any website that wants to DRM content.
ISROʼs last lunar exploration mission was in 2019 and called Chandrayaan-2. The lunar orbiter succeeded. The lunar lander, named Vikram, failed, crashing onto the lunar surface. Vikram contained a lunar rover named Pragyan.
Maybe try out FreedomBox? freedombox is a Debian package which automatically sets up apache2, firewalld, fail2ban and Letʼs Encrypt. It also automatically adds pre-canned configuration files for applications you install with it (e.g. Mediawiki, WordPress, Matrix, Postfix/Dovecot). The theoretical goal of FreedomBox is to allow anyone to set up a webserver and administer it via a webUI. So, although I would say itʼs not quite there yet for command-line-illiterate users, I have found the software useful as a turnkey server to see what makes certain web applications tick, albeït in mostly vanilla form.
For example, after installing a new app like WordPress, you could examine what exactly the FreedomBox scripts changed in the /etc/apache2/ or /etc/fail2ban/ configuration files.
If it's anything like SMTP on a Mediawiki or Discourse instance (example notes, then what you probably need is something called “transactional email” (I'm guessing you're looking at a guide like this?). I've made use of this guide for looking up vendors for that service.
In theory, the same server hosting a Lemmy service could also send and receive emails. However, in practice there's a high probability of these emails landing in spam boxes. The defacto proof-of-work hurdle that inhibits email spam today is paying commercial transactional email companies a monthly fee. I'm hopeful that one day self-hosted email server software will become easier to set up through things like FreedomBox (via Postfix, Dovecot, and Rspamd), but the fundamental reputation problem remains, imo.
So, I doubt a Lemmy setup guide would automatically take care of email setup. In any case, the process involves creating at least one MX record (according to instructions provided by your transactional email service) with your DNS provider which depends on the name servers you have configured for your domain registrar. The transactional email service you select should provide instructions for what port to open, as well as what SMTP URL, user name, password, and postmaster email address to provide to Lemmy.
And a girl.
The Melancholy of Haruhi Suzumiya