Update webserver Dockerfile
diff --git a/docker/webserver/Dockerfile b/docker/webserver/Dockerfile
index 99fc7a5..8f60b38 100644
--- a/docker/webserver/Dockerfile
+++ b/docker/webserver/Dockerfile
@@ -20,7 +20,7 @@
 RUN apt-get -yqq install nginx
 
 # Install Supervisord
-RUN pip install supervisor-stdout
+RUN pip install supervisor-stdout --no-cache-dir
 
 # Add configuration files
 ADD ./supervisord.conf /etc/supervisord.conf
@@ -31,4 +31,4 @@
 RUN service nginx stop
 
 # start supervisor to run our wsgi server
-CMD supervisord -c /etc/supervisord.conf -n 
\ No newline at end of file
+CMD ["supervisord", "-c", "/etc/supervisord.conf", "-n"] 
\ No newline at end of file