• Added the ability to source environment variables from the configuration file, which get expanded at runtime (@aegenet — submitted in PR #136).
• Improved observability of the email notifier (@t3hmrman — submitted in PR #132).
• Bump actix-web from 3.x to 4.x (@aegenet — submitted in PR #136).
• Do not reset the reminder ignore timer anymore when status gets off from dead to healthy or sick, as services might quickly switch between down and up while we still want reminder alerts to be muted.