After my app is successfully pushed via cf I usually need do manually ssh-log into the container and execute a couple of PHP scripts to clear and warmup my cache, potentiall
As mentioned by @Mathis Kretz Swisscom has gotten around to enable cf run-task since this question was posted. They send out e-mails on 22. November 2018 to announce the feature.
As discussed on your linked documentation you use the following commands to manage tasks:
cf tasks [APP_NAME]
cf run-task [APP_NAME] [COMMAND]
cf terminate-task [APP_NAME] [TASK_ID]