This is the last chapter of the book, except the appendices (which have useful information too; don't skip them).
We will conclude the adventure we started 12 chapters ago with the features of Yii 2, which are not related to the business value of the application being constructed but are related to its infrastructure.
When working with the code base together with a team of other developers and routinely deploying code between test and production servers, you will inevitably face some problems you need to solve to continue effectively delivering new features.
First, we'll learn some nice tricks to manage the application configuration to accommodate different deploy targets.
Secondly, we'll talk about the database migrations ...