Update readme

README.md

@@ -1,2 +1,37 @@
 # srb2kart
-Docker container for running a Sonic Robo Blast 2 Kart dedicated server
+
+Docker container for running a Sonic Robo Blast 2 Kart dedicated server.
+
+## Usage
+
+### Basic
+
+At a minumum, UDP port 5029 must be exposed.
+
+`docker run -d --name srb2kart -p 5029:5029/udp brianallred/srb2kart`
+
+You may choose a different host port, just note that players joining your server must specify the port number if it deviates from the default.
+
+### Advanced
+
+#### Configuration
+
+In order to configure server variables, bind the `/config` volume to a host directory, create `kartserv.cfg`, and edit it. Documentation [here](https://wiki.srb2.org/wiki/Console/Variables).
+
+`docker run -d --name srb2kart -p 5029:5029/udp -v /path/on/host/config:/config brianallred/srb2kart`
+
+`$ sudo vim /path/on/host/config/kartserv.cfg`
+
+#### Addons
+
+In order to load addons, bind the `/addons` volume to a host directory and copy them there.
+
+`docker run -d --name srb2kart -p 5029:5029/udp -v /path/on/host/addons:/addons brianallred/srb2kart`
+
+Note that if you're unable to join the server after adding an addon, make sure the addon was loaded correctly (`docker logs srb2kart` is a great place to start).
+
+#### Persistent Data
+
+In order to persist data through server shutdowns, bind the '/data' volume to a host directory.
+
+`docker run -d --name srb2kart -p 5029:5029/udp -v /path/on/host/data:/data brianallred/srb2kart`