Really

nginx with modsecurity, lua and certbot for automated Let's Encrypt SSL certificates

GIT pull from public/private repos with key & launch with pm2-auto-update. Also supports Keymetrics

Docker container to fetch code from repos with key where needed, with support for puppeteer

Tiny net-snmp daemon - snmpd - for situations where it's difficult (like CoreOS)

Docker container providing nginx with lua and certbot with nginx plugin for SSL certificates

nginx with lua

PowerDNS-Admin (https://github.com/ngoduykhanh/PowerDNS-Admin) Docker Container.

PowerDNS Authoritative Server (using MySQL backend)