this is introduction to docker essentials

What a docker is?

• This a platform that runs containers.
• A container bundles an application's code and all the dependencies into one object.
• Containers typlically use less resources than virtual machines.
• Docker containers can run almost everywhere.

Why use it?

• Containers can be easily copied and deployed (no need to worry about hypervisors and other stuff).
• Applications that run in container are segregated from the rest of the host system.
• Containers are cheaper to run than VMs.
• More containers can be run on a hardware as comapred to VMs
• Docker containers can be run on platforms such as AWS, Linode, Google Cloud and etc.

What are the Downsides?

• Not all apps are supported when run in containers (path issue in a source code).

• Performance can be sometimes be inconsistent.

• One might get better performance on Linux host because the container is directly working on top of the Linux kernel.

• To follow the further tutorial goto the file installing_docker.md to install docker on your machine.