Added node to script so it runs correctly on windows

[JaviTrek]

The issue

In Windows, currently npm run start doesn't work. It produces the next error log:

PS D:\Documents\pixijs.com> npm run start                                                          

> pixi-docusaurus@0.0.0 prestart
> npm run write-example-docs

> pixi-docusaurus@0.0.0 write-example-docs
> ./scripts/write-example-docs.js

'.' is not recognized as an internal or external command,
operable program or batch file.

This refers to one of our package.json scripts. "write-example-docs": " ./scripts/write-example-docs.js",

The solution

This is fixed by adding "node" to our script so it writes "write-example-docs": "node ./scripts/write-example-docs.js", After this, now npm run start works correctly and the site loads correctly locally.

This needs to be tested on linux/macos to make sure this addition doesn't break setups on other OS.

[bigtimebuddy]

Thank you!