[TASK] Add more development documentation (#1399)

Resolves:  #1393

Documentation/Environment.rst

@@ -8,3 +8,66 @@ Development environment
 
 You can run the code quality checks and automated tests locally (using a
 local PHP, Composer, and database) or using runTests.sh.
+
+To kickstart the project, we suggest the usage of the
+`TYPO3-testing-distribution <https://github.com/oliverklee/TYPO3-testing-distribution/>`__
+by Oliver Klee as development environment. The distribution comes with a frontend,
+example data and predefined plugins.
+
+.. index:: Clone TYPO3 Testing Distribution
+.. code-block:: bash
+
+   git clone git@github.com:oliverklee/TYPO3-testing-distribution.git
+
+Also clone the tea extension.
+
+.. index:: Clone Tea Extension
+.. code-block:: bash
+
+   git clone git@github.com:FriendsOfTYPO3/tea.git
+
+You can organize the folder structure as you wish, but lets say your folder
+structure looks like this:
+
+.. index:: Folder structure
+.. code-block:: bash
+
+    git\
+        TYPO3-testing-distribution
+        tea
+
+
+Inside the testing distribution there is a file
+:file:`docker-compose.extensions.yaml.template` which mounts the used extensions. This file need to be renamed and adjusted.
+
+.. index:: Create docker-compose.extensions.yaml
+.. code-block:: bash
+
+    cp .ddev/docker-compose.extensions.yaml.template .ddev/docker-compose.extensions.yaml
+
+The file needs to mount the tea extension into the testing distribution. Keep in mind
+that you use the correct paths here.
+
+
+.. index:: Mount extension into testing distribution
+.. code-block:: yaml
+
+    services:
+      web:
+        volumes:
+          - "$HOME/git/tea:/var/www/html/src/extensions/tea:cached,ro"
+
+After that you can start the testing distribution using ddev.
+
+.. index:: Start the testing distribution
+.. code-block:: bash
+
+    ddev start
+    ddev composer install
+    ddev install-typo3
+    ddev db-import
+
+After that you should be able to access the frontend:
+.. code-block:: bash
+
+    ddev launch