The Twelve-Factor App Methodology

When designing a software system, it's not a good idea to reinvent the wheel each time for each new project. Certain parts of software are common to most web service projects. Learning some of the known practices that have proven successful over time is important to avoid making easily fixed mistakes.

In this chapter, we will focus on the Twelve-Factor App methodology. This methodology is a series of recommendations that are well proven for web services that are deployed on the web.

The Twelve-Factor App has its origins in Heroku, a company that provides easy access to deployments. Some of the factors are more general than others, and everything should be considered general advice and not necessarily an imposition. The methodology is less applicable outside of web cloud services, but it's still a good idea to review it and try to extract useful information.

We will present the base details for this methodology...