Docker has tooling for building images and is lighter than VM. Devs can make their docker containers quite easily. With VM you have to update operating system

Docker has tooling for building images and is lighter than VM. Devs can make their docker containers quite easily. With VM you have to update operating system and other stuff. With Docker as a Developer you are concerned only about your direct dependencies. I run my systems in VMs and it is quite a lot of work to update all unrelated stuff. Well related stuff is also a lot of work but that is price I am willing to pay for.