nginx https www redirect to non-www using let's encrypt certbot

You use separate server blocks for each of the four variations of http/s and www/non-www. You never use "if" statements if you can do things another way - Nginx If is Evil.

# http server, static websites        
server {            
  server_name example.com;            

  listen 443 ssl http2;            

  ssl_certificate /var/lib/acme/certs/***CERT_DIRECTORY/fullchain;            
  ssl_certificate_key /var/lib/acme/certs/***CERT_DIRECTORY/privkey;            

  root     /var/www/***rootdir;            
}            

# This server simply redirects the requested to the https version of the page            
server {            
  listen 80;            
  server_name www.example.com example.com;            

  # Let's Encrypt certificates with Acmetool            
  location /.well-known/acme-challenge/ {            
    alias /var/www/.well-known/acme-challenge/;            
  }            

  location / {            
    return 301 https://example.com$request_uri;            
  }            
}            

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

  ssl_certificate /var/lib/acme/certs/***CERT_DIRECTORY/fullchain;            
  ssl_certificate_key /var/lib/acme/certs/***CERT_DIRECTORY/privkey;            

  return 301 https://example.com$request_uri;            
}