Add Gitea Actions CI and release workflows and deployment assets

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

cmd/hammerhead/main.go

@@ -15,6 +15,9 @@ import (
 	"git.veillax.com/Veillax/reef/dotenv"
 )
 
+// version is set at build time (deploy/build.sh).
+var version = "dev"
+
 func env(k, def string) string {
 	if v := os.Getenv(k); v != "" {
 		return v
@@ -36,7 +39,12 @@ func main() {
 	url := flag.String("url", env("HAMMERHEAD_URL", ""), "public URL people reach hammerhead at (used for login redirects and SSO); can also be set in Settings")
 	flag.String("env", ".env", "file to read secrets and settings from")
 	genkey := flag.Bool("genkey", false, "print a new random HAMMERHEAD_MASTER_KEY and exit")
+	showVersion := flag.Bool("version", false, "print the version and exit")
 	flag.Parse()
+	if *showVersion {
+		os.Stdout.WriteString("hammerhead " + version + "\n")
+		return
+	}
 	if *genkey {
 		fmt.Println(secretbox.GenerateKey())
 		return
@@ -55,7 +63,7 @@ func main() {
 		log.Fatal(err)
 	}
 	defer srv.Close()
-	log.Printf("hammerhead listening on %s (open it in a browser to finish setup)", *listen)
+	log.Printf("hammerhead %s listening on %s (open it in a browser to finish setup)", version, *listen)
 	hs := &http.Server{Addr: *listen, Handler: srv.Handler(), ReadHeaderTimeout: 10 * time.Second}
 	log.Fatal(hs.ListenAndServe())
 }