Add usage documentation

README.md

@@ -1 +1,34 @@
 # docker-example-drupal
+
+## Usage
+
+* Run `cp .env.example .env`, otherwise you'll get a `no service selected` error.
+* Run `docker compose up` to start the project.
+
+Alternatively, run `./run start` to run both steps.
+
+* Run `docker compose ps` to see the running services.
+  * There should be services for `database`, `php` and `web`.
+
+## Viewing the site
+
+### With a Traefik proxy
+
+The project is pre-configured to work with a Traefik proxy (I have <https://github.com/OliverDaviesLtd/traefik-development> permanently running).
+
+If this is running, you can view the website at <http://docker-example-drupal.localhost>.
+
+### Without a Traefix proxy
+
+If you don't have a proxy running, you need to expose a port to connect to the web server.
+
+Create a `docker-compose.override.yaml` file with these contents:
+
+```yaml
+services:
+  web:
+    ports:
+      - "8000:80"
+```
+
+Run `docker compose up` again and access the site at `http://localhost:8000`.