noxious_server/nginx.conf

events {
    worker_connections 1024;
}

http {
    upstream socketio_backend {
        server app:${PORT};
    }

    server {
        listen 80;
        server_name ${HOST};

        location /.well-known/acme-challenge/ {
            root /var/www/certbot;
        }

        location / {
            return 301 https://$host$request_uri;
        }
    }

    server {
        listen 443 ssl;
        server_name ${HOST};

        ssl_certificate /etc/letsencrypt/live/${HOST}/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/${HOST}/privkey.pem;

        location / {
            proxy_pass http://socketio_backend;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_set_header Host $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;
        }
    }
}