Docker on the Apple Silicon Mac won't copy the ppx files and use Rosetta

[JonoPrest]

Hi there,

I initially created this pull request then realising it is not as simple as just swapping out process.arch "arm64" for x64.

#278

I am running into issues when using graphql-ppx with docker (in a linux container) running on an Mac M1-Pro chip. The copyPlatformBinaryInPlace.js will say that the platform is unsupported when infact Rosetta will run the linux-x64 ppx file perfectly fine. It would be great to have a solution for this.

Thanks!