Expose an API or option so that it is possible to add custom keywords

[hehoo]

It seems like this middleware didn't expose either an API or option that we are able to add custom keywords during the initialisation. Is it a good idea to add it on? See https://ajv.js.org/custom.html#define-keyword-with-validation-function for more info about custom keywords in ajv

[idanto]

This is a great idea! we would accept a PR with those additions 😃 @hehoo

[hehoo]

@idanto do you have any documentation or design material that can make me quickly familiar with this whole project 😄 ?

[idanto]

@hehoo not really 🙈 Maybe we should write one, I always thought it's a small and simple project but since the koa and OpenAPI 3.0 support it kinda becomes bigger...

But in the meanwhile feel free to ask here any question you have or we can even use slack to communicate if you would like to

[idanto]

you can find this addition in version 0.9.0, thanks for the contribution @hehoo