Ngixn. Allow access to files from site root

location / {
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $http_host;
        proxy_redirect off;
        proxy_connect_timeout   350;
        proxy_send_timeout      350;
        proxy_read_timeout      350;
        proxy_pass http://app_server;
        location ~* ^.+\.(jpeg|jpg|png|gif|bmp|ico|svg|tif|tiff|css|js|htm|ttf|otf|webp|woff|txt|csv|rtf|doc|docx|xls|xlsx|ppt|pptx|odf|odp|ods|odt|psd|ai|eo$
                root           /home/django/public_html;
                expires        max;
                try_files      $uri @fallback;
            }
    }