How to connect SSL Letsencrypt to subdomains?

Question

Nginx

There is a working site with SSL certificates for example.com and www.example.com.
How now to connect SSL to additional subdomains? Because now the browser knocks out security errors and does not allow subdomains without a certificate.
I generated additional certificates with the command

sudo letsencrypt certonly -a webroot --webroot-path=/home/ubuntu/again/222/static -d new.example.com

What to do next? How to push it into the nginx config?

Answer 1

In the Server section describing the subdomain, specify
and write the paths to the certificates

ssl_certificate /path/to/chain.pem;
ssl_certificate_key /path/to/privatekey.pem

Nginx supports SNI, everything will work.