allow nginx config extension

installer/roles/image_build/tasks/main.yml

@@ -134,7 +134,7 @@
   delegate_to: localhost
 
 - name: Stage nginx.conf
-  copy:
+  template:
     src: nginx.conf
     dest: "{{ docker_base_path }}/nginx.conf"
   delegate_to: localhost

installer/roles/image_build/templates/nginx.conf

@@ -84,6 +84,9 @@ http {
             uwsgi_read_timeout 120s;
             uwsgi_pass uwsgi;
             include /etc/nginx/uwsgi_params;
+            {%- if extra_nginx_include is defined %}
+            include {{ extra_nginx_include }};
+            {%- endif %}
         }
     }
 }