Thanks! Is this notation in the README not enough: https://github.com/o8vm/octox#license ?

If you like you can copy what I did: https://github.com/tbillington/bevy_toon_shader, which I copied from https://github.com/bevyengine/bevy/ (just that my repo has was less stuff, so might be easier to copy from).

Both those licenses require you to add the license text as a file to the codebase. Eg see the "How to apply the Apache License to your work" section in the Apache license link that you have there.

Since it's dual-licensed you can add one as LICENSE-MIT and the other as LICENSE-APACHE.

Oh, I see! Thank you very much. I'll add both later!