Remove server header

Dockerfile

@@ -25,6 +25,7 @@ RUN apt-get update --yes --quiet && apt-get install --yes --quiet --no-install-r
     curl \
     git \
     nginx \
+    libnginx-mod-http-headers-more-filter \
     # wand dependencies
     libmagickwand-6.q16-6 libmagickwand-6.q16hdri-6 \
     && apt-get autoremove && rm -rf /var/lib/apt/lists/*

etc/gunicorn.conf.py

@@ -1,5 +1,3 @@
-import gunicorn
-
 wsgi_app = "website.wsgi:application"
 accesslog = "-"
 disable_redirect_access_to_syslog = True
@@ -11,6 +9,3 @@ forwarded_allow_ips = "*"
 
 # Run an additional thread so the GIL isn't sitting completely idle
 threads = 2
-
-# Replace gunicorn's 'Server' HTTP header
-gunicorn.SERVER_SOFTWARE = gunicorn.SERVER = "Wouldn't you like to know"

etc/nginx.conf

@@ -5,11 +5,13 @@ server {
 
   gzip_static on;
 
-  server_tokens off;
-
   set_real_ip_from  0.0.0.0/0;
   real_ip_header X-Forwarded-For;
 
+  # Override nginx's server header
+  more_set_headers "Server: Wouldn't you like to know";
+  server_tokens off;
+
   location / {
     proxy_buffers 32 4k;
     proxy_connect_timeout 240;