Add "How to install" instructions for rpm-ostree variants

[ayhc]

Currently Bodhi only provides installation instructions for dnf, eg:

sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2023-foo

Please add instructions for rpm-ostree, eg

rpm-ostree install [Bodhi URL]

rpm-ostree override replace [Bodhi URL]

This would presumably also require Bodhi to identify which packages are already in a stock image (therefore requiring "override replace").

[travier]

I've found the following code to change to implement this functionality:

bodhi/bodhi-server/bodhi/server/models.py

Line 2388 in 7a2e068

def install_command(self) -> str:

bodhi/bodhi-server/bodhi/server/templates/update.html

Line 10 in 7a2e068

install_command = update.install_command

bodhi/bodhi-server/bodhi/server/templates/update.html

Line 187 in 7a2e068

% if install_command:

bodhi/bodhi-server/tests/test_models.py

Line 2297 in 7a2e068

assert update.install_command == (

[travier]

Reference for the rpm-ostree side: https://coreos.github.io/rpm-ostree/administrator-handbook/#using-overrides-and-usroverlay