Upgrade from Ubuntu 16 CircleCI issues by May 31, 2022

[zangell44]

Current behavior

We are deprecating Ubuntu 16.04-based machine images on CircleCI in preparation for an EOL on Tuesday, May 31, 2022 to ensure your builds remain secure. For more details and a complete schedule of the timeline, please see our blog post..
We will also be conducting temporary brownouts on Tuesday, April 26, 2022 during which these images will be unavailable. If you’re interested in why we’re conducting brownouts, check out this blog post.
We are contacting you because one or more of your projects has a job that uses an Ubuntu 16.04-based image. If you have already upgraded your config and no longer use one of the impacted images, please ignore this email.
The project(s) using an image based on Ubuntu 16.04 within the last 21 days are:
[server]

Proposed behavior

Upgraded ubuntu

Example