Angular Server-Side Configuration

angular-server-side-configuration is an Angular CLI builder and native command-line interface tool designed to enable runtime configuration of Angular applications on the server or within Docker containers using environment variables. This addresses the limitation of Angular CLI's default build-time configuration, providing flexibility in Continuous Delivery environments. It works by searching for environment variable usages at build time and then, via a native CLI, inserting these populated variables into the `index.html` file (or replacing a `<!--CONFIG-->` placeholder) on the host serving the bundled Angular files. The current stable version is 21.0.3, with releases generally aligning with major Angular versions, introducing breaking changes primarily for Angular version upgrades and builder refactoring. Its key differentiator is the separation of build-time processing from deployment-time configuration injection, making it suitable for containerized deployments.