Howtoforge published a tutorial about installing Kuma on Ubuntu 20.04.

How to Install Kuma - Self-hosted Uptime Robot Alternative on Ubuntu 20.04

Uptime-Kuma is an open source monitoring tool like "Uptime Robot" written in Nodejs. It's a self-hosted monitoring tool with a fancy beautiful dashboard and supports multiple notifications methods. The Uptime-Kuma will monitor the uptime of hosts or servers via protocol HTTP(s), TCP, and Ping. If hosts cannot be rach through these protocols in such interval times, the uptime hosts will send notifications via Webhooks, Telegram, Discord, Gotify, Slack, Pushover, Email (SMTP), etc.

How to Install Kuma - Self-hosted Uptime Robot Alternative on Ubuntu 20.04