===== Disable dhclient Modifying Your resolv.conf File =====
I think [[https://www.vultr.com/docs/stop-dhcp-from-changing-resolve-conf/|this]] will work.

  sudo nano /etc/dhcp/dhclient-enter-hooks.d/nodnsupdate

  #!/bin/sh
  make_resolv_conf(){
    :
  }

  sudo chmod +x /etc/dhcp/dhclient-enter-hooks.d/nodnsupdate