This way, something like `just install-service postgres` will
definitely do a `restart` and not a `stop` + `start` (which may leave
dependant services stopped).
This has potentially been addressed by
7acb5f4b85
as well.
It should be noted that this cannot be used for the initial install
of services which require a database or have other dependencies.
Those would typically need to invoke the playbook with
`--tags=install-postgres,install-SERVICE`, etc.
The purpose of this shortcut is to easily rebuild and restart
a single serice subsequently. For those cases, often times there's no need to
reinitialize the database and other components and simply running a
single component's tasks is enough.
