add setup instructions

[amirbey]

rough outline guide from federalist setup

deploy to environment update the user provider service credentials for circleci with req'd key value pairs update the user provider service credentials for federalist builder user with req'd key value pairs obtain a CircleCi token and update the credentials stored in the environment variables define initial space deployer username, password, timestamp for CircleCi env vars schedule credential rotation at x days interval for federalist builder user in circleci config schedule credential rotation at x days interval for circleci user in circleci config