Docker machine deprecated, use multipass for multi-node

[ivorscott]

Add a short text lecture at the beginning of the Swarm section on how to use multipass over docker-machine.

• Create Lecture Note with comment @BretFisher
• Replace lecture with video and more examples (per OS and per network driver)
• Remove all mentions of docker machine and docker toolbox (except to mention it's deprecated)
  • Kubernetes Local Install

Convo in Q&A: https://www.udemy.com/course/docker-mastery/learn/#questions/18305090/
Windows VirtualBox Q&A: https://www.udemy.com/course/docker-mastery/learn/#questions/19719184/

[ivorscott]

Docker Machine is deprecated

Docker has stopped support for docker machine, which was used to create VMs with docker pre-installed. The last release from 2019 is archived on github. There isn't anything wrong with docker machine, Docker simply shifted focus from creating virtual machines. Today there are better alternatives like multipass. For the course, you can still choose to use docker machine but multipass is the best option. You can see Bret discuss multipass on his live show.

[BretFisher]

Written lecture added, video forthcoming.

[BretFisher]

Good info on how to use cloud-init to spin these VMs up fast: https://www.udemy.com/course/docker-mastery/learn/#questions/21233566/