feat: add server version number

main.go

@@ -9,6 +9,7 @@ import (
 	tea "github.com/charmbracelet/bubbletea"
 	"github.com/charmbracelet/charm/client"
 	"github.com/charmbracelet/charm/cmd"
+	"github.com/charmbracelet/charm/server"
 	"github.com/charmbracelet/charm/ui"
 	"github.com/charmbracelet/charm/ui/common"
 	"github.com/spf13/cobra"
@@ -62,6 +63,7 @@ func init() {
 		}
 	}
 	rootCmd.Version = Version
+	server.Version = Version
 
 	rootCmd.AddCommand(
 		cmd.BioCmd,

server/http.go

@@ -53,6 +53,7 @@ func NewHTTPServer(cfg *Config) (*HTTPServer, error) {
 	healthMux := http.NewServeMux()
 	// No auth health check endpoint
 	healthMux.Handle("/", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("X-Version", Version)
 		fmt.Fprintf(w, "We live!")
 	}))
 	health := &http.Server{

server/server.go

@@ -23,6 +23,12 @@ import (
 	"golang.org/x/sync/errgroup"
 )
 
+var (
+	// Version is the version of the Charm Cloud server. This is set at build
+	// time by main.go.
+	Version = ""
+)
+
 // Config is the configuration for the Charm server.
 type Config struct {
 	BindAddr       string `env:"CHARM_SERVER_BIND_ADDRESS" envDefault:""`