A Docker container provides packaged, isolated, and contained environment for applications, including all of their dependencies. Also, a container runs on the same OS kernel as the other containers on a machine. Each container is independent of the other, and they run in separate processes within the operating system in userspace.
Docker isn't connected to any specific IT infrastructure, so it can run on any device or in the cloud. We can create a Docker container from scratch using Docker images. Also, it is possible to use images from the Docker Hub. You can assume that Docker containers are only runtime instances of the environment's template or Docker image.
