About Docker
Containers are pretty similar to virtual machines. The main difference is that Docker allows containers to share the same Linux kernel as the host system that they’re running on. Containers only need to provide the packages and dependencies that are not already available on the host system. This greatly reduces the size of an application and provides a significant boost to performance allowing containers to be booted up in mere milliseconds.
.. It allows developers to work in an environment that perfectly mirrors production, reducing the introduction of bugs to live sites
.. It provides the flexibility to allow containers that run completely different frameworks, programming languages, or operating systems to seamlessly work and communicate with each other on the same host system