diff --git a/auth/docker/Dockerfile b/auth/docker/Dockerfile
index fb877f1..57fbd71 100644
--- a/auth/docker/Dockerfile
+++ b/auth/docker/Dockerfile
@@ -11,4 +11,6 @@ WORKDIR ./auth
 # Stage 2: Final image with Ruby
 RUN bundle install
 
-CMD ["ruby","./auth.rb"]
+EXPOSE 4567
+
+CMD ["ruby","./auth.rb", "-p","4567"]