Install Portainer

Create Docker Volume:  docker volume create portainer_data

Deploy Portainer:

docker run -d \
  -p 8000:8000 \
  -p 9443:9443 \
  --name portainer \
  --restart=always \
  -v /var/run/docker.sock:/var/run/docker.sock \
  -v portainer_data:/data \
  portainer/portainer-ce:latest

Connect to portainer "https://localhost:9443" and setup admin account.

Click Home -> Environments and add the host IP (10.20.10.75, for me) into the Public IP field.

Optionally, change Settings -> Settings -> Application Settings -> URL to https://raw.githubusercontent.com/technorabilia/portainer-templates/main/lsio/templates/templates-2.0.json

References:

https://linuxiac.com/docker-portainer-install/
Start at about 5 minutes - https://www.youtube.com/watch?v=2UrZzXCqcLc