An Azure service that provides an event-driven serverless compute platform.
@Anonymous Annotation does not supported runOnStartup as per the TimerTrigger code. But you can define the same in the configuration section on function.json
I haven't tried it out but looks like once you have build your application you can see the target folder --> azure-functions --> yourtimertriggernamespecified --> Timertriggername -->function.json
You can update this function.json file before deploying your application to azure or post deployment you can also update this function.json using KUDO console.
We have created the pull request to add missing configuration properties for the Timer Trigger annotation : https://github.com/Azure/azure-functions-java-library/pull/154