expose the port
diff --git a/Dockerfile b/Dockerfile
index 5ca6cc5..b1cc091 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,4 +12,5 @@
 
 VOLUME /var/jenkins_home
 ENV JENKINS_HOME /var/jenkins_home
+EXPOSE 8080
 CMD java -jar /usr/share/jenkins/jenkins.war
\ No newline at end of file