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-rw-r--r--README.md5
1 files changed, 4 insertions, 1 deletions
diff --git a/README.md b/README.md
index e5d7d28..bfb810f 100644
--- a/README.md
+++ b/README.md
@@ -13,9 +13,12 @@ $ docker build . -t circus-register
 Then run the container:
 
 ```
-$ docker run --rm -v /var/run/docker.sock:/var/run/docker.sock --net circus -p 8081:8081 circus-register:latest
+$ docker run --rm -v /var/run/docker.sock:/var/run/docker.sock --net circus -p 8081:8081 circus-register:latest -initialVPNPort 1194
 ```
 
+`initialVPNPort` defines the first vpn port to be handed out to a companion
+container.
+
 ## Function
 
 This container should only show a small registration form for the user.  The user