Add auto-generated subdomain feature

When a base domain is configured on a host (e.g., apps.example.com),
deployments automatically get a subdomain ({name}.apps.example.com).
Custom --domain can still be provided to route both domains.

- Add BaseDomain field to Host state
- Add --base-domain flag to host init
- Add 'ship host set-domain' command to update base domain
- Update deploy flow to auto-generate subdomains
- Fix error display (errors were being silently swallowed)
- Remove placeholder email from Caddyfile template

1 files changed, 3 insertions, 0 deletions

diff --git a/cmd/ship/host/host.go b/cmd/ship/host/host.go
index 603a946..81403f9 100644
--- a/cmd/ship/host/host.go
+++ b/cmd/ship/host/host.go
@@ -15,4 +15,7 @@ func init() {
         Cmd.AddCommand(statusCmd)
         Cmd.AddCommand(updateCmd)
         Cmd.AddCommand(sshCmd)
+        Cmd.AddCommand(setDomainCmd)
+
+        initCmd.Flags().String("base-domain", "", "Base domain for auto-generated subdomains (e.g., apps.example.com)")
 }