server {
    listen 80;
    listen [::]:80;

    server_name example.com;
    server_tokens off;

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

server {   
    
     
    ### SSL LetsEncrypt
    listen 443 ssl http2;
    listen [::]:443 ssl http2;

    server_name example.com;
    resolver 127.0.0.11 valid=30s ipv6=off;

    location / {
        set $backend http://example:80;
        proxy_pass $backend;
    }
    
    ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;

    ### Create the dhparam file: 
    ### openssl  dhparam  -out  ssl-dhparams.pem  2048
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;

    ssl_session_timeout 1d;
    ssl_session_cache shared:MozSSL:1m;  # about 4000 sessions
    ssl_session_tickets off;

    # intermediate configuration
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
    ssl_prefer_server_ciphers off;

    # HSTS (ngx_http_headers_module is required) (63072000 seconds)
    add_header Strict-Transport-Security "max-age=63072000" always;
}