Why Docker is used in conjunction with Vagrant?

Question

virtual box

I often saw that Docker is run inside a virtual machine running with Vagrant. What does it give and what are its advantages?
There is also this question:
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Here I have a configured Vagrant virtual machine and Docker separately. Of course, I would like to use Docker. I don’t want to spend resources on maintaining the VM startup, but there is one problem - it cannot mount a directory from the host machine with the right owner (Vagrant has this out of the box). How can this be resolved?

Answer 1

docker switch -v forwards folders

Answer 2

I think this is not in vagrant, but in a virtual machine. Well, with docker, one solution seems to be a shared network and folder sharing.

Answer 3

Docker does not work on IOS and WIndows, so a virtual machine is used. Vagrant helps you quickly set up a VM in which Docker will live later.