Docker is very useful tool for various applications. One of the application, it can be used host your web application on local system. Sometimes, we want to test the application to make sure, it works correctly, without any issues or bugs. To achieve this, the docker can be used to wrap the web application in a container and run it to test it.

Docker provides different images for operating systems to various applications. For example, Ubuntu, CentOS, Arch, OpenJDK (pre-built java), etc. With this, it becomes easier to dockerize the application and execute the application on the cloud without any pre installation or post installations.