Update Testing Guide

Testing-Guide.md

@@ -73,16 +73,29 @@ At this point, we have two choices:
 
 ## Development Servers
 
-When a user runs `docker-compose up -d nginx`, a few things happen:
+When a user runs `docker-compose up -d nginx`, a few things happen
+<small>(some services are omitted)</small>:
 
-1. The `ca` service starts
-2. The `mariadb` service starts
-3. The `git` service starts
-4. The `fastapi` service starts
-5. The `php-fpm` service starts
-6. The `nginx` service starts
+1. The [ca](#certificate-authority) service starts
+2. The [mariadb](#mariadb) service starts
+3. The [git](#git) service starts
+4. The [redis](#redis) service starts
+5. The `memcached` service starts
+6. The [fastapi](#fastapi) service starts
+7. The [php-fpm](#php-fpm) service starts
+8. The [nginx](#nginx) service starts
     - This last service depends on various other services.
 
+###### Notes
+
+The `fastapi` and `php-fpm` services live update when you change
+source files in your tree.
+
+The first step of starting services takes several minutes on Docker
+currently; however, if you load up and rely on hot reload, you can
+do work and restart specific services if need be without concern
+(at least, until you add a dependency).
+
 #### Certificate Authority
 
 The `ca` service will produce a `cache/ca.root.pem` file, which is used to
@@ -92,7 +105,8 @@ sign the `cache/localhost.cert.pem` certificate. Users can import our
 #### mariadb
 
 The `mariadb` service will bind to `localhost:13306` on the host machine. This
-allows users to inspect the database used by the `fastapi` and `php-fpm` services:
+allows users to inspect the database used by the `fastapi` and `php-fpm`
+services:
 
     $ mysql -h127.0.0.1 -P13306 -uaur -paur aurweb \
         -e "SELECT * FROM Packages"
@@ -102,6 +116,40 @@ as the mysql client does something other than reach the mariadb server with
 `localhost` (assumed some type of confusion with localhost, didn't look much
 further).
 
+#### git
+
+The `git` service runs sshd using the aurweb-git-auth backend and
+aurweb-git-update hook. It is accessible at `ssh://aur@localhost:2222` on
+the host system. Users can use this local sshd just like a production
+AUR instance for git management.
+
+Note that in order for you to do anything with the sshd, you'll need
+to either login to a dummy user or register an account and setup
+your public SSH key like you would on aur.archlinux.org.
+
+#### redis
+
+The `redis` service is used as the Redis backend for the `fastapi` service.
+You can converse with the service on `localhost:16379`:
+
+    $ redis-cli -p 16379
+    ...
+
+#### fastapi
+
+The `fastapi` service runs the aurweb FastAPI implementation through
+an ASGI server. Users can configure this with the `FASTAPI_BACKEND`
+environment variable: `uvicorn` or `hypercorn`. It enables hot
+reloading of the server for changes in all directories in your tree,
+which automatically reflects on the [nginx](#nginx) service.
+
+This service is exposed on `localhost:18000`.
+
+#### php-fpm
+
+This service is exposed on `localhost:19000` and majorly depends on
+[./web](https://gitlab.archlinux.org/archlinux/aurweb/-/tree/pu/web).
+
 ###### Generating Dummy Data
 
 <small>**NOTE**: This step requires Python dependencies to be accessible from