[Draft] Proposal: remove debug logger as provider

[rajarju]

Proposal to remove debug logger as the default log provider and use winston logger.

Core logger

• Custom Formatter support
  • Logging in JSON
  • Eternal Log viewers
• Customise transports
• Log levels
• Switch log levels with env variables

debug logger

• Debug logger uses a global DEBUG env variable to define log level and it cannot be over ridden by the aio library.
• The environment variable takes precedence over AIO_LOG_LEVEL
• Logs from 3rd party dependencies will also be logged when using this env variable

Winston

• Use winston as the only log provider
• Expose more winston configs via the aio core logger
• Dependency size

Other Loggers

Logger	Package Size (Minified)
winston	136.9 kB
bunyan	15.7 kB
log4js	77.2 kB
pino	6.3 kB

Bunyan

• API Similar to winston
• Serializers can be complicated
• Supports multiple streams
• Child loggers

Pino

• Light weight and fast
• asynchronous logging
• separate thread for transports
• No support for transports, file and stdout supported
• Logs only in JSON
• additional modules for compatibility
• custom log levels
• good documentation (https://getpino.io)
• pino debug (https://github.com/pinojs/pino-debug)
• no log rotation (use plugin)
• pino-http
• http benchmark