feat: add cmd line option to toggle log levels, get version, get help

[varunsrin]

What is the feature you would like to implement?
A command line option should be added to allow users to toggle between different logging levels, check the version of the app, and print out all available commands.

Why is this feature important?
Will make it easier for users to manage the app in production

Will the protocol spec need to be updated??
No

[vinliao]

I've tried doing this by making a log level setting on CLI, tried setting the logger.level inside commander.action(), doesn't work. Tried making a singleton instance like this:

export class Logger {
  private static instance: Pino.Logger;

  private constructor() {}

  public static getInstance(): Pino.Logger {
    if (!Logger.instance) {
      const logLevel = process.env['NODE_ENV'] === 'test' || process.env['CI'] ? 'silent' : 'info';
      Logger.instance = Pino({ level: logLevel });
    }
    return Logger.instance;
  }

  public static setLogLevel(newLogLevel: string): void {
    Logger.instance = Pino({ level: newLogLevel });
  }
}

Doesn't work too. When I console.log() out the level of each logger, seems like they each have their own log level, and setting the level in one place doesn't change loggers in other modules, even though they're imported from the same place. The easiest solution for this issue seems to be setting the log level from the environment variable, then instantiating a logger instance with the wanted log level.

[varunsrin]

@jcliff already had a pr for this here i think, and ran into the same issue: https://github.com/farcasterxyz/hubble/pull/607/files

this is fine for now, and we can merge this pr in, but id like to keep the issue open so that we can investigate if there's a way to do a flag, since setting flags in cloud environments is usually easier than having to set environment variables.

[jcliff]

@varunsrin I just rebased the change. Let me know if there's any tweaks needed to pass tests and get merged.