I have a vanilla installation of nginx on Ubuntu 14.04 and I am trying to run a reverse proxy in front of a Jenkins installation (running on port 8080 as bellow).I created a conf file to be included in the default configuration and it's picking the new location fine, but it returns a 404 instead of serving the content of the application.What am I missing? It looks exactly as in the nginx admin guide.# /etc/nginx/conf.d/reverse_proxy.confserver {  listen 80 default_server;  server_name this_server_name;  location /jenkins {    proxy_pass http://localhost:8080;    proxy_set_header Host $host;    proxy_set_header X-Real-IP $remote_addr;  }}ps (Edit): The 404 is being returned by Jenkins, not nginx. 
nginx reverse proxy for jenkins returning a 404
nginx;http proxy;jenkins