user friendly error message in Validation error child errors

[adnan-kamili]

It's quite difficult to generate a user friendly error response from the current Validation error object format. Atleast in each child error, a message property should exist with a user friendly error message like the one's generated by Joi etc.

[MichalLytek]

routing-controllers only execute class-validator validation and send Validation Errors as response. However you can create your own mapping function which transform it to the format you want.

You should to the transform on frontend side but if your backend has to return frontend friendly errors, you need to create your own error handler like this.

[github-actions]

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