Use environment variables for configuration

[DarkPark]

Would be nice to have it.

[jsumners]

Please provide details on what you are expecting. Is this request for the CLI tool?

[DarkPark]

@jsumners issue title is rather self-explanatory

instead of

myapp | pino-pretty --singleLine --colorize=1

would be nice to be able to use this

myapp | SINGLE_LINE=true COLORIZE=true pino-pretty

[jsumners]

issue title is rather self-explanatory

If that were the case I wouldn't have asked for more detail.

So, yes, you are looking for environment variable support in the CLI tool.

[DarkPark]

It also would be more natural to use boolean for COLORIZE instead of number.