I am the proud new owner of the Duet 5 and I bought it specifically to do development with the Linux features of the Chrome OS. I ran into one complication installing docker-compose and found many terrible suggestions online.

The offical instructions suggest an approach like this

sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose

But that will result in a file with the content not found in it. So where do we find the url to the version of docker-compose we want? The docker-compose latest release. Scroll down to assets and copy the link to the linux armv7 version and

sudo curl -L "https://github.com/docker/compose/releases/download/v2.1.1/docker-compose-linux-armv7" -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose

and it works!

$ docker-compose --version
Docker Compose version v2.1.1