Implementation of HTTP and HTTPS services with Nginx reverse proxy for multiple domain names

worker_processes auto;

error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

events {
 worker_connections 1024;
}

http {
 include /usr/local/nginx/conf/mime.types;
 default_type application/octet-stream;

 log_format main '$remote_addr - $remote_user [$time_local] "$request" '
      '$status $body_bytes_sent "$http_referer" '
      '"$http_user_agent" "$http_x_forwarded_for"';

 access_log /var/log/nginx/access.log main;

 sendfile on;
 tcp_nopush on;
 tcp_nodelay on;

upstream dx.exzel.co.nz {

 server 127.0.0.1:8080;
}

upstream mybusiness.exzel.co.nz {

 server 192.168.1.252:443;
}

server {
 listen 80;
 server_name dx.exzel.co.nz;
 rewrite ^(.*) https://dx.exzel.co.nz permanent;
}
server {
 listen 443;
 server_name dx.exzel.co.nz;
 ssl on;
 ssl_certificate /etc/letsencrypt/live/dx.exzel.co.nz/fullchain.pem;
 ssl_certificate_key /etc/letsencrypt/live/dx.exzel.co.nz/privkey.pem;
 ssl_session_timeout 5m;
 ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
 ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
 ssl_prefer_server_ciphers on;
 access_log /var/log/nginx/ccieerror.log ;
 location / {
   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_pass http://dx.exzel.co.nz;

 }
}

server {
 listen 80;
 server_name mybusiness.exzel.co.nz;
 rewrite ^(.*) https://mybusiness.exzel.co.nz permanent;
}
server {
 listen 443;
 server_name mybusiness.exzel.co.nz;
 ssl on;
 ssl_certificate /etc/letsencrypt/live/mybusiness.exzel.co.nz/fullchain.pem;
 ssl_certificate_key /etc/letsencrypt/live/mybusiness.exzel.co.nz/privkey.pem;
 ssl_session_timeout 5m;
 ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE:ECDH:AES:HIGH:!NULL:!aNULL:!MD5:!ADH:!RC4;
 ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
 ssl_prefer_server_ciphers on;
 access_log /var/log/nginx/mybusiness.log ;
 location / {
   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_pass https://mybusiness.exzel.co.nz;

 }
}

server {
 listen 80;
 server_name www.empnz.co.nz empnz.co.nz;
  location / {
    proxy_pass http://192.168.1.15 ;
    }
 }

}