Enable local install of all packages for GraphiQL

[tvvignesh]

Hi. I use ariadne for the python services we have and interestingly, the playground didn't open up today and was seemingly stuck here

And when I did debug the same, I noticed that the issue was cause the GraphiQL playground is loading the libs from unpkg which apparently went down at the time as I was debugging it

Now the question/feature request is:

Is it possible to have all dependencies installed locally rather than using a CDN like unpkg for GraphiQL? I am not seeing any related docs for the same - not sure if I am missing anything