Docker daemon is a persistent background process that manages the containers on
a single host.
It is a self-sufficient runtime that manages Docker objects
such as images, containers, network, and storage.
Docker daemon listens for REST API requests and performs a series of
container operations accordingly.
GET /events: Get container events from Docker
GET /images/json: List Docker images
By default this directory is: /var/lib/docker on Linux. C:ProgramDatadocker on Windows.