Creating image for Docker on Linux..!!

As seen on above diagram depicts the workflow involved in the development life-cycle when developing docker images. A developer authors a ‘Dockerfile’, a text file containing instructions on how to build the image , how to package it and which commands to execute to launch an instance from the image. The developer then builds the image and launches a container which runs on a linux host having docker running on it. Once the developer verifies that the image is running as expected , he pushes the image to a registry ( e.g DockerHub) where all docker images are stored ( similar to a Github repository which hosts source code ). Other developers from the team can then simply pull the docker image and build and deploy the image on their respective linux hosts