Add more logs to support verbose logging levels

[brendarearden]

With issue https://github.com/stoplightio/prism/issues/773 getting fixed, we should revisit logging to ensure we are logging what is necessary for all levels.

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Info Level

Currently Includes:

• "Starting..." / "Restarting..." / Loading..."
• "Forwarding..."
• "Received..."
• "No operations found..." / "Unable to find..."

Should Include:

Current level of info logs is acceptable Potentially move some info logs to be debug logs

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Debug Level

Currently Includes:

• "Unable to find"

Should Include:

At least one debug log per main method to highlight main path through process (not every method)

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Trace Level

Currently Includes:

None are currently implemented

Should Include:

At least one trace log per method, including inputs and method names, timestamps if possible If a calculation/transformation is done, resulting output

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Warn Level

Currently Includes:

• "Something went wrong"
• "501 returned"
• unknown format

Should Include:

Ensure all restarts include a warning Errors that don't cause the system to crash

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Error Level

Currently Includes:

• "Request terminated"

Should Include:

Need to log error anytime we stop the application after error

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Fatal Level

Currently Includes:

• when we cannot create prism server

Should Include:

Current level of fatal logs is acceptable

[brendarearden]

A byproduct of allowing different log levels found during the initial review of the addition of verbose logging:

log level warn does not include info level logs - this makes server startup slightly confusing but also expected since the level is set to warn - not sure if we want to brain storm on not showing ANY startup logs.

This is the output when using warn - the server is up and available but we don't really have that info

The starting message is using signale.await({ prefix: chalk.bgWhiteBright.black('[CLI]'), message: 'Starting Prism…' }); and not a logger since the server with logger isn't created at the time its emitted.