Excellent. Glad it’s working.
Upgrading to 1.8.1 is very simple. You get the 1.8.1 docker files (from the release announcement), extract those, replacing your existing ones, and then run docker-compose -f cms_remote-mysql.yml up -d
As it happens, the only difference between the 1.8.0 and 1.8.1 files is the version numbers on the image, so you can simply directly edit your cms_remote-mysql.yml file, and change the image lines for the web and xmr containers:
image: xibosignage/xibo-xmr:release_1.8.1
and
image: xibosignage/xibo-cms:release_1.8.1
Then
docker-compose -f cms_remote-mysql.yml up -d
A backup will be taken of the database, and the upgrade will be run for you. You should then be able to log in to 1.8.1.
I would still advise taking a manual backup before starting however.