docs: Add a contributors guide

Mostly this is adopting policies (both DCO and Contributor Covenent)
that are commonly used by other projects...

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>

1 files changed, 48 insertions, 0 deletions

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+Contributor's Guide
+===================
+
+.. contents::
+   :local:
+   :depth: 2
+
+Introduction
+------------
+
+Anyone can contribute to the wasp-os project. Contributions are typically made
+via github using the typical fork-and-pull-request approach. Contributors who
+do not wish to use github are also welcome to share patches using
+``git format-patch --to wasp-os@redfelineninja.org.uk`` and ``git send-email``.
+
+All contributions must include a ``Signed-off-by`` tag added by the contributor
+who submits the patch or patches. The ``Signed-off-by`` tag is added at the end
+of the patch description and certifies that the contributor either wrote the
+patch or has the right to share the code under the open source license
+appropriate for the file being modified.
+
+A ``Signed-off-by`` tag is an explicit statement that your contribution comes
+under one of (a), (b), (c), or (d) from the list below so please be sure to
+read carefully what you are certifying by adding your Signed-off-by.
+
+Additionally please be aware that that contributors, like all other members of
+the wasp-os community, are expected to meet the community guidelines described
+in the project's code of conduct when interacting within all community spaces
+(including the wasp-os github presence).
+
+Developer Certificate of Origin
+-------------------------------
+
+.. literalinclude:: dco.txt
+   :language: none
+   :emphasize-lines: 1-2,13
+
+This procedure is the same one used by the Linux kernel project. To sign off a
+patch append an appropriate line at the end of the commit message:
+
+.. code-block:: none
+
+    Signed-off-by: Random Developer <r.developer@example.org>
+
+Please use your real name, anonymous and pseudonymous contributions will not be
+accepted.
+
+.. include:: code_of_conduct.rst