src/main.go: use a global variable to display version number, this should be set by the linker during build.

src/main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+    "fmt"
     "os"
     "os/signal"
     "syscall"
@@ -18,6 +19,10 @@ var pidFile string
 //  Global variables
 // ---------------------------------------------------------
 
+// Version string, should be updated by the go linker (by passing "-X main.VersionString=value" to the linker)
+// see: https://pkg.go.dev/cmd/link and
+var VersionString string = "-"
+
 // File descriptor to the current log file.
 var logfd *os.File
 
@@ -135,7 +140,7 @@ func main() {
     }
 
     if version {
-        print("Version: v1.2.2\n")
+        fmt.Printf("Version: %s\n", VersionString)
         return;
     }