Nginx IPv6 server block and upstream for uWSGI apps.

Nginx Configuration for UWSGI Upstream

upstream uwsgi_host {
  server unix:/tmp/flaskapp.sock;
}

server {
  listen 80 default_server;
  listen [::]:80 default_server ipv6only=on;

  location ^~ /static/ {
      alias /srv/www/flaskapp/app/static;
  }

  location / { try_files $uri @flaskapp; }
  location @flaskapp {
      include uwsgi_params;
      uwsgi_pass uwsgi_host;
  }
}