Add Gitea Actions CI and release workflows and deployment assets

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

cmd/blacktip/main.go

@@ -13,6 +13,9 @@ 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
@@ -35,7 +38,12 @@ func main() {
 	acmeDNS := flag.String("acme-dns", os.Getenv("BLACKTIP_ACME_DNS"), "with -traefik: DNS-challenge provider (e.g. cloudflare) for wildcard certificates; its credentials go in this process's environment")
 	noACME := flag.Bool("no-acme", false, "with -traefik: serve Traefik's self-signed certificate instead of requesting Let's Encrypt ones")
 	flag.String("env", ".env", "file to read secrets and settings from")
+	showVersion := flag.Bool("version", false, "print the version and exit")
 	flag.Parse()
+	if *showVersion {
+		os.Stdout.WriteString("blacktip " + version + "\n")
+		return
+	}
 	if *hh == "" || *token == "" {
 		flag.Usage()
 		os.Exit(2)
@@ -47,6 +55,7 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
+	log.Printf("blacktip %s starting", version)
 	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt)
 	defer stop()
 	if err := b.Run(ctx); err != nil {