Docker & Docker Compose
Docker is a set of platform-as-a-service (PaaS) products that use OS-level virtualization to deliver software in packages called containers.[5] The service has both free and premium tiers. The software that hosts the containers is called Docker Engine.[6] It was first released in 2013 and was developed by [Docker, Inc.](https://en.wikipedia.org/wiki/Docker,_Inc.)[[7]](https://en.wikipedia.org/wiki/Docker_(software)#cite_note-os4u-7)
Docker is a tool that is used to automate the deployment of applications in lightweight containers so that applications can work efficiently in different environments in isolation.