Self-configuration from Next config

[adam-rocska]

The library has hard-coded nextjs default which covers for most nextjs use cases, but could misbehave in environments with highly-customized NextJS configurations.

This issue can easily be covered, but won't spend an effort now.

IF YOU NEED THIS ENHANCEMENT please upvote, comment, hit an emoji, do anything so that we know.

[adam-rocska]

• it has a small amount of 21G flavored config treatments, which is again not cool.

We'll spend on generalizing this, just let us know if you need it.