location / {

    if ($request_method = 'OPTIONS') {
       add_header 'Access-Control-Allow-Origin'      '*' always;
       add_header 'Access-Control-Allow-Methods'     'GET, POST, OPTIONS, PUT, PATCH' always;
       add_header 'Access-Control-Allow-Headers'     'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization,Pragma,Origin,X-Context,app-id' always;
       add_header 'Access-Control-Expose-Headers'    'Content-Length,Content-Range,Access-Control-Allow-Origin,Access-Control-Allow-Methods,Access-Control-Allow-Headers,Access-Control-Allow-Credentials' always;
       add_header 'Access-Control-Allow-Credentials' 'true' always;
       #
       # Tell client that this pre-flight info is valid for 20 days
       #
       add_header 'Access-Control-Max-Age' 1728000 always;
       add_header 'Content-Type' 'text/plain; charset=utf-8' always;
       add_header 'Content-Length' 0 always;
       return 204;
    }

    add_header 'Access-Control-Allow-Origin'      '*' always;
    add_header 'Access-Control-Allow-Methods'     'GET, POST, OPTIONS, PUT, PATCH' always;
    add_header 'Access-Control-Allow-Headers'     'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Range,Authorization, Pragma, Origin, X-Context, app-id' always;
    add_header 'Access-Control-Expose-Headers'    'Content-Length,Content-Range,Access-Control-Allow-Origin,Access-Control-Allow-Methods,Access-Control-Allow-Headers,Access-Control-Allow-Credentials' always;
    add_header 'Access-Control-Allow-Credentials' 'true' always;

    proxy_set_header   Host              $http_host;
    proxy_set_header   X-Real-IP         $remote_addr;
    proxy_set_header   X-Forwarded-For   $proxy_add_x_forwarded_for;
    proxy_redirect     off;

    include         uwsgi_params;
    uwsgi_pass      unix:/var/www/uwsgi/project.sock;
}