grim/convey

stop messing the with HOME envvar, we don't need to and add back the ${VCS}_* envvars for backwards compatibility
tasks:
normal:
type: docker/run
image: nginx:alpine
detach: true
health-check:
type: docker/run
image: nginx:alpine
detach: true
healthcheck:
interval: 1s
timeout: 3s
command: wget -O - http://localhost
plans:
default:
stages:
- tasks:
- normal
- tasks:
- health-check