The world of software development is changing faster than ever. The need for faster release cycle times has led to a proliferation of virtualization technologies. Virtual machines (VMs) have been around for many years, but containers have recently overshadowed them because VMs are slower and not as lightweight as containers. With the popularity of microservices, containers have emerged as an excellent alternative to virtual machines for developing, testing, and deploying applications in a lightweight environment.
There comes Docker, an open-source technology that uses Linux containers to virtualize apps and other software processes so they can run independently and more securely in another container as if they were separate computer programs on the same device.