`./sandbox up` fails upon first time run

[ribal-aladeeb]

I'm following the TICK stack getting setup documentation. Executing ./sandbox up fails with the following message:

 => CANCELED ...
  failed to parse stage name "kapacitor:kapacitor:latest": invalid reference format

The thing to pay attention to here is kapacitor:kapacitor:latest. That is likely because of the .env which adds the image name to the tag variables.

Replacing the contents of the .env from

TELEGRAF_TAG=telegraf:latest
INFLUXDB_TAG=influxdb:1.8
CHRONOGRAF_TAG=chronograf:latest
KAPACITOR_TAG=kapacitor:latest

to

TELEGRAF_TAG=latest
INFLUXDB_TAG=1.8
CHRONOGRAF_TAG=latest
KAPACITOR_TAG=latest

fixed the issue