fix docs for nginx

            # proxy all requests not matching other locations to Gunicorn

            location /galaxy {

                proxy_set_header Host $http_host;

                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

                proxy_set_header X-Forwarded-For $remote_addr;

                proxy_set_header X-Forwarded-Proto $scheme;

                proxy_set_header Upgrade $http_upgrade;

                proxy_pass http://unix:/srv/galaxy/var/gunicorn.sock:/galaxy;