Deploying camunda webapp on process engine cloud

I want to integrate custom spring application with camunda webapp (7.9 distribution) and deploy it on google cloud process engine. I’m able to run spring application on jetty server but not able to access camunda url such as cockpit, admin,tasklist. How to provide connectivity between my application and camunda. Do I need to create jar for 7.9 camunda webapp and include it in my app.