How to serve images and other uploaded files with NGINX?

edit

I have installed successfully the Askbot using CentOS 7 + PostgreSQL + Gunicorn + Nginx

But it won't shows any images you can check the url

http://139.59.24.83/questions/

my nginx configuration is

server {
        listen 80;
        server_name 127.0.0.1;

        location = /favicon.ico { access_log off; log_not_found off; }
        location /static/ {
            root /home/techbrown;
        }
location / {
            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_set_header X-Forwarded-Proto $scheme;
            proxy_pass http://unix:/home/techbrown/techbrown.sock;
        }
}

Thanks @Evgeny for kind help.. :)