add connection docs

Author: funnyboy-roks

src/SUMMARY.md

@@ -3,6 +3,7 @@
 ---
 
 - [Getting Started](./getting-started/index.md)
+    - [Connecting](./getting-started/connecting.md)
 - [Configuration](./config/index.md)
     - [Runtime](./config/runtime.md)
     - [Setup](./config/setup.md)

src/getting-started/connecting.md

@@ -0,0 +1,20 @@
+# Connecting to a competition
+
+When the basalt application opens, you will be prompted for a game code
+or IPv4 address.  This is how the application knows how to connect to
+the competition.
+
+You can get your ip address and game code using the following command if
+you have the [Basalt CLI](https://github.com/basalt-rs/basalt-cli)
+installed:
+
+```sh
+basalt game-code -c <path-to-config>
+```
+
+which will output something like
+
+![basalt cli output](./game-code.png)
+
+You may enter either blue section as the game code when connecting to
+your server.