Setup https on nginx

I’ve tried following three or four tutorials, but I still can’t get my site to load with https. I bought a ssl certificate from namecheap and they gave me three files when I generated the ssl. A Key, A Certificate and the csr. I have saved each in /root/example.com.crt /root/example.com.key /root/example.com.csr

Following along the tutorial found at https://www.digitalocean.com/community/tutorials/how-to-install-an-ssl-certificate-from-a-commercial-certificate-authority I have rebuilt my /etc/nginx/sites-available/example.com file to be this:

#Redirect from 80
server {
    listen 80;
    server_name example.com;
    rewrite ^/(.*) https://example.com/$1 permanent;
}

server {
  listen 443 ssl;
  server_name example.com;
  ssl_certificate /root/example.com.crt;
  ssl_certificate_key /root/example.com.key;
  ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
  ssl_prefer_server_ciphers on;
  ssl_ciphers 'EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH';
  root /var/www/html;
  index index.html;
  default_type "text/html";

  location / {
    try_files $uri $uri/ /index.html;
  }

#redirect for api's to node server.
  location /api {
    # Serve api requests here. This will connect to your node
    # process that is running on port 3001.
    proxy_pass http://localhost:3001;
    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;
  }
}

Before I tried to get this running on ssl everything was running fine. When I run sudo service nginx restart. Currently it restarts just fine. 

I have changed /etc/nginx/sites-available/default to

server {
 listen 443 ssl default_server;
 root /var/www/html;
 index index.html index.htm index.nginx-debian.html;
 server_name _;
 location / {
   try_files $uri $uri/ =404;
 }
}

Any thoughts?