Added Matrix service guide

src/README.md

@@ -90,6 +90,7 @@ Welcome to the Start9 Docs! Here you will find everything you need to set up and
   - [Connecting to Core Lightning](service-guides/lightning/cln/)
   - [Connecting to LND](service-guides/lightning/lnd/)
   - [Using LNbits](service-guides/lightning/lnbits.md)
+- [Matrix](service-guides/matrix/)
 
 ### Misc Guides
 

src/SUMMARY.md

@@ -106,6 +106,7 @@
         - [Alby](service-guides/lightning/lnbits/alby.md)
         - [BlueWallet](service-guides/lightning/lnbits/bluewallet.md)
         - [Zeus](service-guides/lightning/lnbits/zeus.md)
+- [Matrix](service-guides/matrix/README.md)
 
 # Misc Guides
 

src/service-guides/matrix/README.md

@@ -0,0 +1,29 @@
+# Matrix
+
+Synapse
+-------
+
+  With registrations disabled, the only way to create an account on your Server is through the Admin Portal.  The Admin Portal is the preferred method for creating an account.
+
+1. In your Start9 UI, under `Services > Synapse`, click "Launch UI"
+1. Log in with your Admin Username and Password (located in Properties). For "Homeserver URL", do `not` enter your Homeserver address. Instead, enter your Admin Portal URL.
+
+    ```admonish note
+
+    This is the URL currently showing in your browser URL bar, excluding the path. e.g. https://exampleaddress.local or http://exampleaddress.onion.
+
+    ```
+
+    ![Synapse Admin](./assets/synapse-admin-1.png)
+
+
+1. In the "Users" tab, you will notice the admin user already created.
+
+1. In the "Users" tab, click "+ Create"
+
+    ![Synapse Admin](./assets/synapse-admin-2.png)
+   
+1. Choose a User-ID, Displayname, and Password for your account. Optionally enter an email address under the 3PIDs section. It is not recommended to make this user a Server Administrator, as it is best to limit admin access.
+   
+    ![Synapse Admin](./assets/synapse-admin-3.png)
+