Improve contribution docs

[donalmurtagh]

I was trying to setup a local development environment for angular-schema-form. Here's what I did:

• Cloned all the repos into sibling folders, as described in CONTRIBUTING.md
• Installed karma (this was not mentioned in CONTRIBUTING.md)
• Ran npm install (this was not mentioned in CONTRIBUTING.md)
• Ran bower install (this was not mentioned in CONTRIBUTING.md)
• Ran npm run test

The guidelines for how to setup a local dev. environment should be complete: ideally, it should be possible to build and run the tests simply by copy-pasting a series of commands. Any assumptions that are made about the local environment (e.g. npm is already installed) should be documented.

@json-schema-form/angular-schema-form-lead

[Anthropic]

@donalmurtagh was there anything else to add to this, did you need to install webpack/eslint globally with -g to get build to work for example?

[Anthropic]

@donalmurtagh would this suffice?

How to setup to develop

To get started clone all json-schema-form library repos into sibling folders.

git clone https://github.com/json-schema-form/json-schema-form-core.git
git clone https://github.com/json-schema-form/angular-schema-form.git
git clone https://github.com/json-schema-form/angular-schema-form-bootstrap.git
git clone https://github.com/json-schema-form/angular-schema-form-material.git

Install Node.js for your development environment. Currently working in Node v8.1.2 at least.

Install dev/global dependencies and bower references to use demo site

npm install
npm install -g webpack eslint mocha # json-schema-form-core
npm install -g webpack eslint karma # angular-schema-form
bower install

Once cloned each repo has npm commands for assisting development

npm run test # Run unit tests
npm run build # Run the build
npm run dist # not in json-schema-form-core # Run the build and minify
npm run watch # Run the build and watch for changes

[Anthropic]

@donalmurtagh please re-open if you have more to add or think there's anything else I should add?