Docs how to test (2nd) (#24094)

* Big testing doc refactor
* Combine all the testing documentation in to one place to make it easier to find
* Convert everything to RST
* Create testing_network guide
* Create testing landing page
* For each section detail "how to run" and "how to extend testing"
* More examples
* Lots more detail

docs/docsite/rst/dev_guide/testing_httptester.rst

@@ -0,0 +1,72 @@
+**********
+httptester
+**********
+
+.. contents:: Topics
+
+Overview
+========
+
+``httptester`` is a docker container used to host certain resources required by :doc:`testing_integration`. This is to avoid CI tests requiring external resources (such as git or package repos) which, if temporarily unavailable, would cause tests to fail.
+
+HTTP Testing endpoint which provides the following capabilities:
+
+* httpbin
+* nginx
+* SSL
+* SNI
+
+
+Source files can be found at `test/utils/docker/httptester/ <https://github.com/ansible/ansible/tree/devel/test/utils/docker/httptester>`_
+
+Building
+========
+
+Docker
+------
+
+Both ways of building ``docker`` utilize the ``nginx:alpine`` image, but can
+be customized for ``Fedora``, ``Red Hat``, ``CentOS``, ``Ubuntu``,
+``Debian`` and other variants of ``Alpine``
+
+When utilizing ``packer`` or configuring with ``ansible-playbook``,
+the services will not automatically start on launch, and will have to be
+manually started using::
+
+    cd test/utils/docker/httptester
+    ./services.sh
+
+Such as when starting a docker container::
+
+    cd test/utils/docker/httptester
+    docker run -ti --rm -p 80:80 -p 443:443 --name httptester ansible/ansible:httptester /services.sh
+
+docker build
+------------
+
+::
+
+    cd test/utils/docker/httptester
+    docker build -t ansible/ansible:httptester .
+
+packer
+------
+
+The ``packer`` build will use ``ansible-playbook`` to perform the
+configuration, and will tag the image as ``ansible/ansible:httptester``::
+
+    cd test/utils/docker/httptester
+    packer build packer.json
+
+Ansible
+=======
+
+::
+    cd test/utils/docker/httptester
+    ansible-playbook -i hosts -v httptester.yml
+
+
+Extending httptester
+====================
+
+If you have sometime to improve ``httptester`` please add a comment on the `Testing Working Group Agenda <https://github.com/ansible/community/blob/master/MEETINGS.md>`_ to avoid duplicated effort.