Amend contributing documentation

CONTRIBUTING.rst

@@ -5,13 +5,74 @@ If you would like to contribute to ``django-environ``, please take a look at the
 `current issues <https://github.com/joke2k/django-environ/issues>`_.  If there is
 a bug or feature that you want but it isn't listed, make an issue and work on it.
 
-How to Contribute
------------------
+Bug reports
+-----------
+
+*Before raising an issue, please ensure that you are using the latest version
+of django-environ.*
+
+Please provide the following information with your issue to enable us to
+respond as quickly as possible.
+
+* The relevant versions of the packages you are using.
+* The steps to recreate your issue.
+* The full stacktrace if there is an exception.
+* An executable code example where possible
+
+Guidelines for bug reports:
+
+* **Use the GitHub issue search** — check if the issue has already been
+  reported.
+* **Check if the issue has been fixed** — try to reproduce it using the latest
+  ``main`` or ``develop`` branch in the repository.
+* Isolate the problem — create a reduced test case and a live example.
+
+A good bug report shouldn't leave others needing to chase you up for more
+information. Please try to be as detailed as possible in your report. What is
+your environment? What steps will reproduce the issue? What OS experience the
+problem? What would you expect to be the outcome? All these details will help
+people to fix any potential bugs.
+
+Feature requests
+----------------
+
+Feature requests are welcome. But take a moment to find out whether your idea
+fits with the scope and aims of the project. It's up to *you* to make a strong
+case to convince the project's developers of the merits of this feature. Please
+provide as much detail and context as possible.
+
+Pull requests
+-------------
+
+Good pull requests - patches, improvements, new features - are a fantastic
+help. They should remain focused in scope and avoid containing unrelated
+commits.
+
+Follow this process if you'd like your work considered for inclusion in the
+project:
 
 1. Check for open issues or open a fresh issue to start a discussion around a
    feature idea or a bug.
-2. Fork `the repository <https://github.com/joke2k/django-environ>`_ on GitHub
-   to start making your changes to the **develop** branch (or branch off of it).
+2. Fork `the repository <https://github.com/joke2k/django-environ>`_
+   on GitHub to start making your changes to the ``develop`` branch
+   (or branch off of it).
 3. Write a test which shows that the bug was fixed or that the feature works as
    expected.
 4. Send a pull request and bug the maintainer until it gets merged and published.
+
+If you are intending to implement a fairly large feature we'd appreciate if you
+open an issue with GitHub detailing your use case and intended solution to
+discuss how it might impact other work that is in flight.
+
+We also appreciate it if you take the time to update and write tests for any
+changes you submit.
+
+**By submitting a patch, you agree to allow the project owner to license your
+work under the same license as that used by the project.**
+
+Resources
+---------
+
+* `How to Contribute to Open Source <https://opensource.guide/how-to-contribute/>`_
+* `Using Pull Requests <https://help.github.com/articles/about-pull-requests/>`_
+* `Writing good commit messages <http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html>`_