Nginx SSL Certificate Basic Installation.

domain.ssl.conf

# this is usually under cd /etc/nginx-sp/vhosts.d
# file paths are for serverpilot.io but the settings should be the same for every nginx. 
# certificate_file.crt is usually a chain bundle that you can create with a simple cat.
# thanks to regan: https://www.digitalocean.com/community/questions/install-ssl-certificate-manually-on-serverpilot-2?answer=23780

server {
listen 443 ssl;
listen [::]:443 ssl;
server_name
www.DOMAIN.com
DOMAIN.com
;

ssl on;

ssl_certificate /home/certs/domain_name/certificate_file.crt;
ssl_certificate_key /home/certs/domain_name/privatekey_file.key;

root   /srv/users/serverpilot/apps/APP_NAME/public;

access_log  /srv/users/serverpilot/log/APP_NAME/APP_NAME_nginx.access.log  main;
error_log  /srv/users/serverpilot/log/APP_NAME/APP_NAME_nginx.error.log;

proxy_set_header    Host              $host;
proxy_set_header    X-Real-IP         $remote_addr;
proxy_set_header    X-Forwarded-For   $proxy_add_x_forwarded_for;
proxy_set_header    X-Forwarded-SSL on;
proxy_set_header    X-Forwarded-Proto $scheme;

include /etc/nginx-sp/vhosts.d/APP_NAME.d/*.nonssl_conf;
include /etc/nginx-sp/vhosts.d/APP_NAME.d/*.conf;
}