What is Docker Container? Docker explained in 5 minutes

What is Docker Container? How far do Docker containers scale?
What is containerization?
Large Applications and Web Deployments like Google and twitter and platform providers such as Heroku and dot cloud, all run on container technology. Containers can be scaled to hundreds or thousands or even millions of them running in Parallel, which is not possible with non container technology So what is containerization : Usually code developed on one machine might not work optimally on a different machine because of dependencies. The problem was solved by containerization where the application is bundled together with the dependencies and libraries in the form of container
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