Improve logging for gateways returned by menshen

Also: Log protocol and transport for gateway given by menshen (v5)

pkg/config/version/version.go

 package version
 
 import (
+	"os/exec"
 	"strings"
+
+	"github.com/rs/zerolog/log"
 )
 
 var (
 	// set during build with '-X 0xacab.org/leap/bitmask-vpn/pkg/config/version.appVersion'
-	appVersion = "unknown"
+	appVersion = ""
 
-    // set when `git archive` is used, the "$Fromat:%(describe)" will be replaced
-    // by the o/p of `git describe` https://git-scm.com/docs/gitattributes#_export_subst
+	// set when `git archive` is used, the "$Fromat:%(describe)" will be replaced
+	// by the o/p of `git describe` https://git-scm.com/docs/gitattributes#_export_subst
 	gitArchiveVersion = "$Format:%(describe)$"
 )
 
@@ -20,7 +23,15 @@ func Version() string {
 	case appVersion != "":
 		return appVersion
 	default:
-		// should not reach here
-		return ""
+		out, err := exec.Command("git", "describe").Output()
+		if err != nil {
+			log.Trace().
+				Err(err).
+				Msg("Could not get running version with git")
+			return "unknown"
+		} else {
+			version := string(out)
+			return strings.TrimSpace(version)
+		}
 	}
 }