I fixed this issue. It was a bear and took several hours to accomplish it so I am going to put it here so others Googling this issue can do what I finally did to solve it. This is a lot harder than it should be! I suspect most of the issue stem from the tutorials being ancient. While this took a lot of time to figure out, but with these commands this can take literally a few minutes.

The very first thing I had to do was move /var/www/ghost to /var/www/example.com/ghost

I also had to run service ghost stop

then I edited the System startup files by nano /etc/systemd/system/ghost.service

I edited out the location /var/www/ghost to /var/www/example.com/ghost

Now I edited configurations, you can see them below. After editing all of those, I rebooted the machine with shutdown -r now

I hope this can help someone else in the same predicament.

Here is my Config.js file with the pertinent parts—notice the port is different:
config = {
// ### Production
// When running Ghost in the wild, use the production environment.
// Configure your URL and mail settings here
production: {
url: ’http://www.example.com’,
mail: {},
database: {
.......
.......
server: {
host: ‘127.0.0.1’,
port: '2778’
}

Here is my Nginx site configuration(notice there are two server blocks and the port in location has been changed.
server {
listen 80;
listen [::]:80;

server_name www.example.com; # Replace with your domain

root /usr/share/nginx/html;
index index.html index.htm;

client_max_body_size 10G;

location / {
    proxy_pass http://localhost:2778;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $http_host;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_buffering off;
}

}
server {
listen 80;
servername example.com;
return 301 http://www.example.com$requesturi;
}

@JackZ

Add all domains to your server_name directive like this:

server_name example.com www.example.com

Hope this helps.