Source: https://github.com/boschkundendienst/guacamole-docker-compose
Video that helped me first time through: https://www.youtube.com/watch?v=GX53C80c05k

To install:
1. cd /srv/docker
2. sudo git clone "https://github.com/boschkundendienst/guacamole-docker-compose.git"
3. sudo mv guacamole-docker-compose /srv/docker/guacamole
4. cd guacamole
5. sudo ./prepare.sh
6. If using portainer then paste and modify the compose.yml into a stack
7. First sign in will be IP:8095/guacamole
8. Creds guacadmin for both user and password
9. PLEASE change/delete said default user