Logging suitable for CI mode must be supported.

[b6pzeusbc54tvhw5jgpyw8pwz2x6gs]

Description

When i run npx serverless --debug, a lot of meaningless logs are output. This makes debugging very difficult.

In CI mode (non-interactive mode), Repeated Deploying... logs should not be output.

Many other packages use the --ci option or an environment variable such as CI=true.

[medikoo]

@herrlegno this project is no longer evaluated, and any forks are totally fine, and probably the best way to improve that work (note it's published under permissive license) /cc @eahefnawy