docs: Improve Contributing Guide (#508)

Author: dplewis

CONTRIBUTING.md

@@ -7,8 +7,6 @@ When committing, keep all lines to less than 80 characters, and try to
 follow the existing style. Before creating a pull request, squash your commits
 into a single commit. Please provide ample explanation in the commit message.
 
-In addition there's a pretty cool [class inheritance diagram](http://parseplatform.org/parse-php-sdk/graph_class.html) you can check out as well.
-
 Installation
 ------------
 
@@ -28,15 +26,13 @@ To setup the Test Parse Server:
 * Run `npm install` from the project root to download the server and it's dependencies.
 * When you're ready to run tests use `npm start` from the project root to boot up the test server.
 
-The embedded test server utilizes this [parse server test] project.
-It's setup with the appropriate configuration to run the php sdk test suite.
-Additionally it handles setting up mongodb for the server.
+The test server is setup with the appropriate configuration to run the php sdk test suite. Additionally it handles setting up mongodb for the server. If you have a mongodb instance already running, you can use `npm run server-only`.
 
 If you have specific needs and would like to alter your test server you can fork and modify the aforementioned test project.
 Alternately you can configure a compatible test server as follows:
 
 * [Setup a local Parse Server instance]
-* Add main.js in tests/cloudcode/cloud/ to your Parse Server configuration as a cloud code file
+* Add cloud-code.js in tests to your Parse Server configuration as a cloud code file
 * Ensure your App ID, REST API Key, and Master Key match those contained in tests/Parse/Helper.php
 * Add a mock push configuration, for example:
 ```json
@@ -70,6 +66,10 @@ You may also run tests directly using phpunit as follows:
 
     npm test
 
+For debugging you can use the `print` function found in tests/Parse/Helper.php
+
+    Helper::print()
+
 Make sure your code is linted with phpcs ([PSR-2 Coding Style]):
 
     npm run lint
@@ -90,11 +90,13 @@ If you do not have XDebug tests will still run, just without coverage.
 Please make sure that any new functionality (or issues) you are working on are covered by tests when possible.
 If you have XDebug setup and can view code coverage please ensure that you do your best to completely cover any new code you are adding.
 
+## Code of Conduct
+
+This project adheres to the [Contributor Covenant Code of Conduct](CODE_OF_CONDUCT.md). By participating, you are expected to honor this code.
+
 [Get Composer]: https://getcomposer.org/download/
 [Get npm]: https://www.npmjs.com/get-npm
-[Contributor License Agreement]: https://developers.facebook.com/opensource/cla
 [XDebug]: https://xdebug.org/
-[parse server test]: https://github.com/montymxb/parse-server-test
 [Setup a local Parse Server instance]: https://github.com/parse-community/parse-server#user-content-locally
 [PSR-2 Coding Style]: http://www.php-fig.org/psr/psr-2/