[Feature Request]: Support custom the process of run. ask for use in Apple M1

Thanks for the great tool at first.

I'm currently developping an app by Electron Fiddle, but I met some problem when run my app in Fiddle.

My Macbook is M1, so the arch is ARM64. when I run app, the Fiddle is auto run: `npm install xxx`. But for some dependances, I need install with special command, for example: sharp

I need install it by `npm install --ignore-scripts=false --foreground-scripts --verbose sharp`, else the app will could not be run.

so I suggest that FIddle could provide a way to custom the RUN command. (or maybe there had have one, but I can't find it)

Thanks agagin