What is Docker in Nodejs?
Docker is a new technology that allows developers to build, manage, and secure applications anywhere. Docker is a command-line interface (CLI) and Engine. In March 2013 Docker was created by dotCloud and renamed itself to Docker Inc. Because of its possibilities to open for software delivery and deployment Docker is very popular. Docker is popularly known because it is very easy to use and it can be learned quickly. Docker is an open-source containerization platform with operating systems that support Virtualbox. Docker is for Windows/Mac and it also supports containers natively such as Linux. In fact, it is one of the preferred kind of platforms used for development in many top-class Nodejs web development companies.
Docker ensures that the functioning of the application is irrespective of changes in the environment. Docker is a tool using the container to make the creation, deployment, and execution of applications. Containers like Ubuntu, CentOS, etc. these are basically based on your requirement with respect to operating systems.
The most important aspects of Docker are Dockerfile, Docker Images, and Docker Containers. If we talk about Dockerfile then it is a text document that contains the list of commands. Command list which can be invoked by a user and the user using the command line to assemble an image. Docker automatically builds images by reading instructions from the Dockerfile. Docker image, you can consider as similar to a template that typically used to build Docker containers. Templates are nothing but you can say it is a building block of a Docker Container. Docker Container, it is a running instance of a Docker Image. Docker containers hold the complete package that is required to execute the application.