...
sendfile off;

# SSL Settings
ssl on;
ssl_certificate /etc/letsencrypt/live/website.com/fullchain.pem;
ssl_certificate_key /etc/letsencrypt/live/website.com/privkey.pem;
include /etc/nginx/snippets/ssl-params.conf;

root /var/www/website.com/public;
index index.html index.htm;

location / {
    proxy_set_header    Host $host;
    proxy_set_header    X-Real-IP $remote_addr;
    proxy_set_header    X-Forwarded-Proto $scheme;
    proxy_set_header    X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header    X-Forwarded-Host $server_name;

    proxy_pass          http://127.0.0.1:20000;

    proxy_redirect      off;

}

version: '3.3'

services:
   db:
     image: mysql:5.7
     volumes:
       - db_data:/var/lib/mysql
     restart: always
     environment:
       MYSQL_ROOT_PASSWORD: x
       MYSQL_DATABASE: wordpress
       MYSQL_USER: wordpress
       MYSQL_PASSWORD: x

   wordpress:
     depends_on:
       - db
     image: wordpress:latest
     ports:
       - "20000:80"
     restart: always
     environment:
       WORDPRESS_DB_HOST: db:3306
       WORDPRESS_DB_USER: wordpress
       WORDPRESS_DB_PASSWORD: x
volumes:
    db_data: