`CONTRIBUTING.md` development instructions missing build step

[mattrossman]

I am trying to set up this project for local development.

I read the "How to develop" section in CONTRIBUTING.md:

three-vrm/CONTRIBUTING.md

Lines 5 to 13 in 57d7bda

	## How to develop
	The below should work:
	```sh
	yarn
	cd packages/three-vrm
	yarn dev
	```

When I run the steps shown and open http://localhost:10001/examples/ I see the examples page, but when I open one such as basic.html, I get an import error in the console:

❌ Uncaught TypeError: Failed to resolve module specifier "@pixiv/three-vrm-materials-mtoon". Relative references must start with either "/", "./", or "../".

I also see some warnings in the terminal:

It seems the instructions should include a yarn build step after the initial yarn install:

yarn 
yarn build
cd packages/three-vrm 
yarn dev 

That allows me to run the examples properly.

[0b5vr]

That is true, we have to rearrange the yarn scripts.

Thank you for the workaround steps.

[0b5vr]

ahh, I just noticed that simply running yarn does not build submodules in the first place. thank you!