try to get version from runtime/debug

internal/metadata/version.go

@@ -1,16 +1,23 @@
 package metadata
 
 import (
-	"os"
+	"fmt"
+	"runtime/debug"
 	"strings"
 )
 
-func getVersion() string {
-	content, _ := os.ReadFile("version.txt")
-	version := strings.TrimSpace(string(content))
+var (
+	GoTomatoVersion = "" // The GoTomato version
+	ProtocolVersion = "" // The protocol version
+)
 
-	return version
+func init() {
+	info, ok := debug.ReadBuildInfo()
+	fmt.Printf("%v", info)
+	if !ok {
+		GoTomatoVersion = "unknown"
 	}
 
-var GoTomatoVersion = getVersion()                           // The GoTomato version
-var ProtocolVersion = strings.Split(GoTomatoVersion, ".")[0] // The protocol version
+	GoTomatoVersion = info.Main.Version
+	ProtocolVersion = strings.Split(GoTomatoVersion, ".")[0]
+}

version.txt

@@ -1 +0,0 @@
-devel