Allow the hosts for accessories to be specified by host or role, or on
all app hosts by setting `daemon: true`.
```
# Single host
mysql:
host: 1.1.1.1
# Multiple hosts
redis:
hosts:
- 1.1.1.1
- 1.1.1.2
# By role
monitoring:
roles:
- web
- jobs
```
* main:
Wording
Remove accessory images using tags rather than labels
Update readme to point to ghcr.io/mrsked/mrsk
Validate that all roles have hosts
Commander needn't accumulate configuration
Pull latest image tag, so we can identity it
Default to deploying the config version
Remove unneeded Dockerfile.dind, update Readme
add D-in-D dockerfile, update Readme
Commander had version/destination solely to incrementally accumulate CLI
options. Simpler to configure in one shot.
Clarifies responsibility and lets us introduce things like
`abbreviated_version` in one spot - Configuration.
