As a developer, I'd like to configure my Sitecore environment in a way that's optimal for development, so that I can have a faster development environment and an easier debugging experience.

Concept

Allow configuration of development-specific Web.config transforms and App_Config patches in the development entrypoint. Docker Tools would provide some of the essentials, but developers could add others.

Transforms/patches would be organized into folders, and the folder names could be used to enable specific patches.

Example

SITECORE_DEVELOPMENT_PATCHES=CustomErrorsOn,DebugOn,OptimizeCompilationsOn,InitializeLogsOff,DiagnosticsOff,RobotDetectionOff

Why not do this in a Dockerfile?

It allows you to have a consistent image build for dev, test, and prod, and makes these development-only transforms transient.

Is there some way to set Web.config values purely with environment variables and configBuilders?

My POC with Section Handlers was only half-successful. It's possible for customErrors but not compilation, due to availability of the app domain during configuration load.

Why an environment variable and not a entrypoint script argument?

Seems cleaner this way, but open to input on this.