Add basic RC steam and user/pass authentication

README.md

@@ -6,11 +6,20 @@ A collection of open source servers for FreeJam games
 
 ### CardLife
 
-To use get CardLife to use these servers, replace the ServerConfig.json file in the game files with [this ServerConfig.json](assets/cardlife/ServerConfig.json).
+To get CardLife to use these servers, replace the ServerConfig.json file in the game files with [this ServerConfig.json](assets/cardlife/ServerConfig.json).
 
 ### Robocraft
 
-??? (This might require modifying `/etc/hosts`... remember to mention the Windows equivalent)
+To get Robocraft to use these servers, please add the following to your OS's `hosts` file:
+
+```
+127.0.0.1       robocraftstaticdata.s3.amazonaws.com
+127.0.0.1       services-1.servers.robocraftgame.com
+```
+
+The `hosts` file can be found at `/etc/hosts` on Linux and `C:\Windows\system32\drivers\etc\hosts` on Windows. Usually this requires elevated permissions (root/admin) to edit.
+
+// TODO Don't expect people to run these servers on their own computer
 
 ## Privacy