improve doc

README.md

@@ -75,18 +75,18 @@ Then, John will send his messages on both "s1-and-s2" and "car-warranty". As alw
 
 John sends the message to his server
 **John** --("hello" on: )-> **S1**
-           ( - "s1-and-s2"             )
-           ( - "car-warranty"          )
+( - "s1-and-s2" )
+( - "car-warranty" )
 
 S2 subscribed to "s1-and-s2", so S1 sends this message to S2
 **S1** --("hello" on: )-> **S2**
-           ( - "s1-and-s2"             )
-           ( - "car-warranty"          )
+( - "s1-and-s2" )
+( - "car-warranty" )
 
 Bob subscribed to "car-warranty", so S2 sends this message to Bob
 **S2** --("hello" on: )-> **Bob**
-           ( - "s1-and-s2"             )
-           ( - "car-warranty"          )
+( - "s1-and-s2" )
+( - "car-warranty" )
 ```
 
 This requires John to know of "s1-and-s2" and, obviously, Bob to subscribe to "car-warranty". Jane and Alice could agree on their own primary channel and use "s1-and-s2" just like John did.
@@ -112,9 +112,10 @@ As you can see, there are many ways to connect multiple servers and communicate
 2. To use an app, **open it in your web browser**. Most apps will install offline support automatically so you can use them on local networks without an internet connection.
 3. If you are using a smartphone, **add the app to your homescreen and launch it**.
 4. Enter your server address when asked, but note:
-  - `http://` or `https://` (the secure variant) are protocols to request data and receive a single response
-  - To send messages, apps use so-called WebSockets instead. Their protocol is `ws://` or `wss://` (the secure variant)
-  - You will need to **replace `http` with `ws`**:
+
+- `http://` or `https://` (the secure variant) are protocols to request data and receive a single response
+- To send messages, apps use so-called WebSockets instead. Their protocol is `ws://` or `wss://` (the secure variant)
+- You will need to **replace `http` with `ws`**:
   - `http://192.168.0.100:3000` -> `ws://192.168.0.100:3000`
   - `https://192.168.0.200:3000` -> `wss://192.168.0.200:3000`
 
@@ -154,7 +155,8 @@ The port and channels are self-explanatory. For servers, you'll need to provide
     "wss://192.168.0.200:3000"
   ],
   "subscribedChannels": [
-    "blue", "purple"
+    "secondary-channel-1",
+    "secondary-channel-2"
   ]
 }
 ```