Setting up SSL with nginx reverse proxy

I’m about to launch a major website. having a bit of a trouble with configuring SSL correctly, and need to make sure I don’t screw it up.

I do have SSL cert files, and following the guide here: https://www.digitalocean.com/community/tutorials/how-to-install-an-ssl-certificate-from-a-commercial-certificate-authority#install-certificate-on-web-server

1. I have an Nginx in front/root acting as a reverse proxy.
2. I have wordpress on Apache server at port 8090
3. and my app is at port 8000 (nodejs), consuming API from wordpress above.

So my current setup is such: 1. /etc/nginx/sites-available/default:

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

    root /var/www/html;
     index index.php index.js index.html index.htm index.nginx-debian.html;
     server_name domain.com www.domain.com;

    location / {
        proxy_pass http://localhost:8000;
        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;
    }

    location /wordpress {
        proxy_pass http://localhost:8090;
        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;
    }
}

2. /etc/apache2/ports.conf:

Listen 8090

<IfModule ssl_module>
        Listen 443
</IfModule>

<IfModule mod_gnutls.c>
        Listen 443
</IfModule>

So, I suppose I need to modify ** /etc/nginx/sites-available/default:** like below.

Just need someone to tell me if there’s something wrong here:

server {
     listen 443 ssl default_server;
     listen [::]:443 ssl default_server;

     root /var/www/html;
     index index.php index.js index.html index.htm index.nginx-debian.html;
     server_name domain.com www.domain.com;
     ssl_certificate /ssl/domain.com.chained.crt;
     ssl_certificate_key /ssl/domain.com.key;

    location / {
        proxy_pass http://localhost:8000;
        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;
    }

    location /wordpress {
        proxy_pass http://localhost:8090;
        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;
    }
}