Deploying multiple different applications into a single short-lived container along with a master runtime

Multi-application instance deployment in a containerized environment includes containerizing an instance of an application manager in a short-lived container and deploying into the container, both a bundle of different event handlers associated with one application instance of one application, and also a bundle of additional event handlers associated with a different application instance of a different application. Thereafter, the application manager manages inter-application communications between the one application instance and the different application instance, and routes events for both the one application instance and the different application instance in an event router included as part of the application manager. Hence, the application manager may be viewed as providing a virtualization layer on top of the short-lived container.