Use full json file instead of decoding in order to use build image from gcr
Use full json file instead of decoding in order to use build image from gcr

See this solution for more details:
https://discuss.circleci.com/t/impossible-to-use-a-private-gcr-io-base-image-on-circle-2-0/15965/2?u=laurawadden

StemboltEU/solidus_bare_docker,StemboltEU/solidus_bare_docker,StemboltEU/solidus_bare_docker,StemboltEU/solidus_bare_docker