Update Dockerfile to Ubuntu 22.04 as 18.04 is EOL - #731

Enhance your code review process with GitHub Actions

GitHub Actions make it easy to automate all your software workflows, now with world-class CI/CD.
Build, test, and deploy your code right from GitHub. Learn more about GitHub Actions.

Linux, macOS, Windows, and containers

Matrix builds

Any language

Live logs

Built-in secret store

Multi-container testing