Why do you need it?

In this article we will learn, why do you need Docker? To understand this lets take an example.

Lets say, you got an requirement of setting up an end to end application stack, including various different technologies, like a Web server using NodeJs, a Database such a MongoDB, and a messaging system like Redis, and an orchestration tool like Ansible. You will have lot of issues while setting up these environments, and developing application using all these technology stack.