Configuring Data/Env in Application

    1. $ vela config get test
    2.   a: b
    3.   c: d
    1. $ vela config set test a=b
    2. $ vela config set test2 c=d
    3. $ vela config ls
    4. NAME
    5. test2
    1. name: testapp
    2. services:
    3.   env-config-demo:
    4.     image: heroku/nodejs-hello-world
    5.     config: demo