Flask Framework Cookbook - Second Edition

Containerization with Docker

A container can be thought of as a standardized package of code that's needed to run the application and all its dependencies, which allows the application to run uniformly across multiple environments and platforms. Docker is a tool that allows for a standard and easy method of creating, distributing, deploying, and running applications using containers. Docker is essentially a virtualization software, but instead of visualizing the whole operating system, it allows the application to use the underlying host OS and requires applications to package additional dependencies and components as needed. This makes Docker container images very lightweight and easy to distribute.