Simplify Dockerfile
Simplify Dockerfile

GoogleCloudPlatform/scalable-resilient-web-app,GoogleCloudPlatform/scalable-resilient-web-app,GoogleCloudPlatform/scalable-resilient-web-app,erickcantwell/scalable-resilient-web-app,erickcantwell/scalable-resilient-web-app,erickcantwell/scalable-resilient-web-app