Setting up separate mgmt account

You can use separate AWS accounts for Digger locks and target infrastructure.

• If you only pass AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY env vars, same account will be used for both

• If in addition you also pass DIGGER_AWS_ACCESS_KEY_ID and DIGGER_AWS_SECRET_ACCESS_KEY vars then those will be used for Digger locks, and the first pair will be used as target account