Update Testing Guide

Testing-Guide.md

@@ -18,7 +18,31 @@ Branches containing FastAPI are located in the pipeline/coverage status table be
 |--------------|
 | ![pipeline](https://gitlab.archlinux.org/archlinux/aurweb/badges/pu/pipeline.svg?key_text=build) ![coverage](https://gitlab.archlinux.org/archlinux/aurweb/badges/pu/coverage.svg) |
 
-## Requirements
+## Locations 
+
+Testers should choose one of the following methods:
+
+- [aur-dev.archlinux.org Testing](#aur-devarchlinuxorg-testing)
+- [Docker Testing](#docker-testing)
+
+**Too long, didn't read?** Running a local Docker instance is much more flexible
+in terms of testing -- testers have complete access to the MariaDB database
+used by both the `php-fpm` and `fastapi` services. For users who do not wish
+to interact with Docker, the `aur-dev.archlinux.org` instance can be used
+to perform any testing.
+
+See [Accounts](#accounts) for an explanation on obtaining accounts
+in either system.
+
+### aur-dev.archlinux.org Testing
+
+A Docker instance of the `pu` branch is hosted at https://aur-dev.archlinux.org
+and can be used by anybody to test the code-base.
+
+### Docker Testing
+
+The following table lists out requirements needed to run our `docker-compose`
+services:
 
 | Package          | Distribution | Method                                  |
 |------------------|--------------|-----------------------------------------|
@@ -312,14 +336,16 @@ described below.
 
 ###### Add User
 
-<small>**Note**: To use the script, you'll need a valid AUR_CONFIG to the
-target database and aurweb Python dependencies (see [poetry](#poetry-python-dependencies)).
-Users can also `docker exec python /aurweb/util/adduser.py ...` from a
-Docker host if you wish to avoid installing poetry dependencies.</small>
-
 You can create a user account in the database using the
 [util/adduser.py](https://gitlab.archlinux.org/archlinux/aurweb/-/tree/pu/util/adduser.py) script.
 
+Users can run `adduser.py` from the Docker host without installing any
+host dependencies:
+`docker exec -it <fastapi_container> python /aurweb/util/adduser.py ...`.
+
+See `docker exec -it <fastapi_container> python /aurweb/util/adduser.py --help`
+for details on command line arguments.
+
 ## User Experience
 
 Some of the most important testing we could do for aurweb at this