Problem setting up Full node/Validator

Hi,
I am having issue with the following command to create an account:

docker run -v pwd:/root/.celo -it us.gcr.io/celo-testnet/celo-node:alfajores account new

The error I receive is “Unable to find image ‘us.gcr.io/celo-testnet/celo-node:alfajores’”

What am I missing?

Thanks

SF