A simple HTTPS enabled Nginx config.

nginx.config

server {
    listen 80;
    server_name <domain-name>;
    return 301 https://$host$request_uri;
}

server {
    listen 443 ssl;

    server_name <domain-name>;
    ssl_certificate /path/to/crt;
    ssl_certificate_key /path/to/key;

    ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
    ssl_prefer_server_ciphers on;
    ssl_ciphers 'EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH';

    location / {
        proxy_pass <IP-address>;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header HOST $host;
        proxy_cache_bypass $http_upgrade;
    }
}