Add more things to CONTRIBUTING.md (#101875)

* Add more things to CONTRIBUTING.md

* I forgot about QA!

Author: Hixie

CONTRIBUTING.md

@@ -22,11 +22,23 @@ page on our wiki.
 
 We communicate primarily over GitHub and [Discord](https://github.com/flutter/flutter/wiki/Chat).
 
-_See also: [Flutter's code of conduct](CODE_OF_CONDUCT.md)_
+Before you get started, we encourage you to read these documents which describe some of our community norms:
+
+1. [Our code of conduct](CODE_OF_CONDUCT.md), which stipulates explicitly
+   that everyone must be gracious, respectful, and professional. This
+   also documents our conflict resolution policy and encourages people
+   to ask questions.
+
+2. [Values](https://github.com/flutter/flutter/wiki/Values),
+   which talks about what we care most about.
 
 Helping out in the issue database
 ---------------------------------
 
+Triage is the process of going through bugs and determining if they are valid, finding out
+how to reproduce them, catching duplicate reports, and generally making our issues list
+useful for our engineers.
+
 If you want to help us triage, you are very welcome to do so!
 
 1. Join the #hackers-triage [Discord channel](https://github.com/flutter/flutter/wiki/Chat).
@@ -52,6 +64,26 @@ If you want to help us triage, you are very welcome to do so!
    [contributor access](https://github.com/flutter/flutter/wiki/Contributor-access) wiki
    page for details.
 
+
+Quality Assurance
+-----------------
+
+One of the most useful tasks, closely related to triage, is finding and filing bugs. Testing
+beta releases, looking for regressions, creating test cases, adding to our test suites, and
+other work along these lines can really drive the quality of the product up. Creating tests
+that increase our test coverage, writing tests for issues others have filed, all these tasks
+are really valuable contributions to open source projects.
+
+If this interests you, you can jump in and submit bugs without needing anyone's permission!
+The #hackers-tests channel on our [Discord server](https://github.com/flutter/flutter/wiki/Chat)
+is a good place to talk about what you're doing. If you want to contribute test cases, you
+can also submit PRs, see the next section for how to set up your development environment.
+
+> As a personal side note, this is exactly the kind of work that first got me into open
+> source. I was a Quality Assurance volunteer on the Mozilla project, writing test cases for
+> browsers, long before I wrote a line of code for any open source project. —Hixie
+
+
 Developing for Flutter
 ----------------------
 
@@ -63,39 +95,26 @@ that describe these methodologies. The following list is ordered: you
 are strongly recommended to go through these documents in the order
 presented.
 
-1. [Our code of conduct](CODE_OF_CONDUCT.md), which stipulates explicitly
-   that everyone must be gracious, respectful, and professional. This
-   also documents our conflict resolution policy and encourages people
-   to ask questions.
-
-2. [Values](https://github.com/flutter/flutter/wiki/Values),
-   which talks about what we care most about.
-
-3. [Setting up your engine development environment](https://github.com/flutter/flutter/wiki/Setting-up-the-Engine-development-environment),
+1. [Setting up your engine development environment](https://github.com/flutter/flutter/wiki/Setting-up-the-Engine-development-environment),
    which describes the steps you need to configure your computer to
    work on Flutter's engine. If you only want to write code for the
    Flutter framework, you can skip this step. Flutter's engine mainly
    uses C++, Java, and Objective-C.
 
-4. [Setting up your framework development environment](https://github.com/flutter/flutter/wiki/Setting-up-the-Framework-development-environment),
+2. [Setting up your framework development environment](https://github.com/flutter/flutter/wiki/Setting-up-the-Framework-development-environment),
    which describes the steps you need to configure your computer to
    work on Flutter's framework. Flutter's framework mainly uses Dart.
 
-5. [Tree hygiene](https://github.com/flutter/flutter/wiki/Tree-hygiene),
+3. [Tree hygiene](https://github.com/flutter/flutter/wiki/Tree-hygiene),
    which covers how to land a PR, how to do code review, how to
    handle breaking changes, how to handle regressions, and how to
    handle post-commit test failures.
 
-6. [Issue hygiene](https://github.com/flutter/flutter/wiki/Issue-hygiene),
-   which covers our processes around triaging bugs, escalating high
-   priority bugs, assigning bugs, and our GitHub labels and
-   milestones.
-
-7. [Our style guide](https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo),
+4. [Our style guide](https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo),
    which includes advice for designing APIs for Flutter, and how to
    format code in the framework.
 
-8. [Flutter design doc template](https://flutter.dev/go/template),
+5. [Flutter design doc template](https://flutter.dev/go/template),
    which should be used when proposing a new technical design.  This is a good
    practice to do before coding more intricate changes.
 
@@ -107,3 +126,58 @@ there are many pages on [our Wiki](https://github.com/flutter/flutter/wiki/),
 and an article [Contributing to Flutter: Getting Started](https://medium.com/@ayushbherwani/contributing-to-flutter-getting-started-a0db68cbcd5b)
 on Medium that may be of interest. For a curated list of pages see the sidebar
 on the wiki's home page. They are more or less listed in order of importance.
+
+
+Outreach
+--------
+
+If your interests lie in the direction of developer relations and developer outreach,
+whether advocating for Flutter, answering questions in fora like
+[Stack Overflow](https://stackoverflow.com/questions/tagged/flutter?sort=Newest&filters=NoAnswers,NoAcceptedAnswer&edited=true)
+or [Reddit](https://www.reddit.com/r/flutterhelp/new/?f=flair_name%3A%22OPEN%22),
+or creating content for our [documentation](https://docs.flutter.dev/)
+or sites like [YouTube](https://www.youtube.com/results?search_query=flutter&sp=EgQIAxAB),
+the best starting point is to join the #hackers-devrel [Discord channel](https://github.com/flutter/flutter/wiki/Chat).
+From there, you can describe what you're interested in doing, and go ahead and do it!
+As others become familiar with your work, they may have feedback, be interested in
+collaborating, or want to coordinate their efforts with yours.
+
+
+API documentation
+-----------------
+
+Another great area to contribute in is sample code and API documentation. If this is an area that interests you, join our
+[Discord](https://github.com/flutter/flutter/wiki/Chat) server and introduce yourself on the #hackers-deverl, #hackers-framework,
+or #hackers-engine channels, describing your area of interest. As our API docs are integrated into our source code, see the
+"developing for Flutter" section above for a guide on how to set up your developer environment.
+
+To contribute API documentation, an excellent command of the English language is particularly helpful, as is a careful attention to detail.
+We have a [whole section in our style guide](https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo#documentation-dartdocs-javadocs-etc)
+that you should read before you write API documentation. It includes notes on the "Flutter Voice", such as our word and grammar conventions.
+
+In general, a really productive way to improve documentation is to use Flutter and stop any time your have a question: find the answer, then
+document the answer where you first looked for it.
+
+We also keep [a list of areas that need better API documentation](https://github.com/flutter/flutter/issues?q=is%3Aopen+is%3Aissue+label%3A%22d%3A+api+docs%22+sort%3Areactions-%2B1-desc).
+In many cases, we have written down what needs to be said in the relevant issue, we just haven't gotten around to doing it!
+
+We're especially eager to add sample code and diagrams to our API documentation. Diagrams are generated from Flutter code that
+draws to a canvas, and stored in a [special repository](https://github.com/flutter/assets-for-api-docs/#readme). It can be a lot of fun
+to create new diagrams for the API docs.
+
+
+Releases
+--------
+
+If you are interested in participating in our release process, which may involve writing release notes and blog posts, coordinating the actual
+generation of binaries, updating our release tooling, and other work of that nature, then reach out on the #hackers-releases
+channel of our [Discord](https://github.com/flutter/flutter/wiki/Chat) server.
+
+
+Social events in the contributor community
+------------------------------------------
+
+Finally, one area where you could have a lot of impact is in contributing to social interactions among the Flutter contributor community itself.
+This could take the form of organizing weekly video chats on our Discord, or planning tech talks from contributors, for example.
+If this is an area that is of interest to you, please join our [Discord](https://github.com/flutter/flutter/wiki/Chat) and ping Hixie on the #hackers
+channel!