Nginx对Django应用程序响应404,但静态文件有效

我跟着 this tutorial 为了让我的Django应用程序部署在带有uWSGI和Nginx的DigitalOcean VPS上。静态文件工作得很好,但Django应用程序本身却不行。(404未找到-nginx/1.9.6)

# Where to look for content (static and media)
root    /srv/www/$host/;

# Allow gzip compression
gzip_types text/css application/json application/x-javascript;
gzip_comp_level 6;
gzip_proxied any;
# Look for files with .gz to serve pre-compressed data
gzip_static on;

server {        
    listen 80;
    # nginx docs recommend try_files over "if"
    location    /   {
        # Try to serve existing files first
        try_files $uri @proxy =404;
    }
    location @proxy {
        # Pass other requests to uWSGI
        uwsgi_pass unix://srv/apps/_/server.sock;
        include uwsgi_params;
    }
}