Add default explanation

Author: Hein

self-hosting/installation/coolify.mdx

@@ -20,6 +20,14 @@ Think of it as a self-hosted alternative to platforms like Heroku or Netlify.
         <Frame>
             <img src="/images/coolify/powersync_resource.png"/>
         </Frame>
+        <Note>
+             The default one-click deployable PowerSync Service uses
+            * MongoDB for internal storage,
+            * PostgreSQL for replication, and
+            * [Sync Rules](/usage/sync-rules) as defined for the To-Do List demo application found in [Demo Apps / Example Projects](/resources/demo-apps-example-projects).
+
+            If you are running the demo To-Do List application, you can jump to Step 4 and simply deploy the PowerSync Service.
+        </Note>
     </Step>
     <Step title="Update environment variables">
         Navigate to the `Environment Variables` tab and update the environment variables as per your requirements. For more information on what environment variables are available, see
@@ -55,15 +63,13 @@ Think of it as a self-hosted alternative to platforms like Heroku or Netlify.
         <Frame>
             <img src="/images/coolify/powersync_deploy.png"/>
         </Frame>
+        The PowerSync Service will now be available at
+        * `http://localhost:8080` if default config was used, or
+        * `http://{your_coolify_domain}:{PS_PORT}` if a custom domain or port was specified.
     </Step>
 </Steps>
 
-
-## Configuration
-
-The PowerSync Service requires two configuration files to run - `powersync.yaml` and `sync_rules.yaml`
-
-### Environment Variables
+## Environment Variables
 
 <table>
     <thead>
@@ -77,7 +83,7 @@ The PowerSync Service requires two configuration files to run - `powersync.yaml`
         <tr>
             <td><code>POWERSYNC_CONFIG_PATH</code></td>
             <td>This is the path (inside the container) to the YAML config file</td>
-            <td>/config/powersync.yaml</td>
+            <td>/home/config/powersync.yaml</td>
         </tr>
         <tr>
             <td><code>PS_DATABASE_TYPE</code></td>
@@ -96,7 +102,7 @@ The PowerSync Service requires two configuration files to run - `powersync.yaml`
         </tr>
         <tr>
             <td><code>PS_MONGO_URI</code></td>
-            <td>The port the PowerSync API is accessible on</td>
+            <td>The MongoDB URI used internally by the PowerSync Service</td>
             <td>mongodb://mongo:27017</td>
         </tr>
         <tr>