UnicornTranscoder.conf

<VirtualHost *:80>
   ServerName transcoder.myplex.com
   Redirect permanent / https://transcoder.myplex.com
</VirtualHost>

<VirtualHost *:443>
  ServerName transcoder.myplex.com

  # Logs
  ErrorLog /var/log/httpd/transcoder.myplex.com-error_log
  CustomLog /var/log/httpd/transcoder.myplex.com-access_log common

  # SSL managed by Certbot
  SSLEngine On
  SSLProxyEngine on
  SSLCertificateFile "/etc/letsencrypt/live/myplex.com/fullchain.pem"
  SSLCertificateKeyFile "/etc/letsencrypt/live/myplex.com/privkey.pem"

  # Proxy
  ProxyRequests Off
  ProxyPreserveHost On
  ProxyPass / http://<UnicornTranscoderIP>:<port>/
  ProxyPassReverse / http://<UnicornTranscoderIP>:<port>/
</VirtualHost>