Nginx reverse proxy with websocket upgrade

server {
    listen 443 ssl http2;
    server_name paste.example.com;

    location / {
        proxy_pass http://127.0.0.1:8096;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }
}