Why Docker Containers?
One common problem that most developers face is when an application runs on one machine but doesn’t on another. This can be due to different OS and different versions of libraries like a developer developed an application using nodejs 14.1 but the cloud instance has nodejs 9.2 installed.This is the exact problem that a docker container solves, it packages the app’s libraries and all the dependencies, prebuilt and ready to be executed. It is isolated from other containers and makes the application feel that it is the only application running on the system.Many organizations are now moving to containers from virtual machines as containers are lightweight and easy to maintain using the provided CLI.It also helps in an easy adaptation of microservices architecture moving away from traditional monolithic systems. Other benefits include scalability, modification, and maintenance.
Docker – Container for NGINX
Docker is an open-source platform that enables developers to easily develop, ship, and run applications. It packages an application along with its dependencies in an isolated virtual container which usually runs on a Linux system and is quite light compared to a virtual machine. The reason is that a container shares the OS kernel with only its binaries/libraries loaded with it. To know more about docker, read Introduction to docker.