Docker is a Linux tool-set that containerises processes and services. This makes running a system as simple as installing docker on a Linux host, and starting a service using in special configuration file. The VE3LSR admin team has created and shared a number of docker container images for many popular HAM services. You can find these images and their descriptions on the docker hub.
IRCddbGateway
LinBPQ
AllMon2
HBLink
DMRLink
Analog_Bridge
AmbeServer