The HTML5 Application Repository service on SAP Business Technology Platform (BTP) is specifically designed to store and manage the lifecycle of HTML5 applications. In a CI/CD context, it acts as the central repository for the built application artifacts (HTML, CSS, JavaScript files, etc.). The CI/CD pipeline deploys the application content to this repository. At runtime, the application router retrieves the static content from the repository to serve it to the end-user, effectively decoupling the application's frontend from its backend services.