pipeline multiple updates

• updated workflow rules
• updated job names
• updated container versions
• added a template for gke-initialization

app/k8s-manifests/configmap.yaml

-apiVersion: v1
-kind: ConfigMap
-metadata:
-  name: app-config
-data:
-  PORT: 3000
-  # MONGODB_URL: mongo-service.namespace (from infra repo. Does this work? Or do I have to dynamically set it?)
-  MONGODB_URL: mongodb://<mongo-service>:27017/todo-app