Update 'README.md'

README.md

@@ -6,10 +6,8 @@ Run with the following environment variables:
 
 ```
 HOSTNAME       (default: Quake)
-GAME_PORT      (default: 27960)
-RCON_PORT      (default: 28960)
 PASSWORD       (default: none)
-RCON_PASSWORD  (default: none)
+ADMIN_PASSWORD (default: none)
 STATS_PASSWORD (default: none)
 ```
 
@@ -25,9 +23,9 @@ services:
       - '27960:27960/tcp'
       - '28960:28960/tcp'
     environment:
-      - HOSTNAME=JackNet
-      - PASSWORD=password123
-      - RCON_PASSWORD=superSecurePassword
+      HOSTNAME: 'JackNet'
+      PASSWORD: 'password123'
+      ADMIN_PASSWORD: 'superSecurePassword'
 ```
 
-Mount /game if you want some level of persistence. I haven't tried getting updates to work, so instead I just download from fresh on each boot.
+Mount `/game` if you want to persist the server files. Else, it will download on each launch.