Domain 1

server {
listen 80;
server_name domain1.com;
return 301 $scheme://www.$host$request_uri;
}

server {
listen 80;
server_name www.domain1.com;
root /home/domain1/public_html;
...
}

Domain 2 (SSL)

server {
listen 80;
server_name domain2.com;
return 301 $scheme://www.$host$request_uri;
}

server {
listen 80;
server_name www.domain2.com;
return 301 https://$host$request_uri;
}

server {
listen 443 ssl http2;
server_name www.domain2.com;

ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_certificate /home/nginx/ssl/domain2.com/domain2.com.crt;
ssl_certificate_key /home/nginx/ssl/domain2.com/domain2.com.key;
root /home/domain2/public_html;
...
}