use the correct exit code on failure

Author: pomdtr

main.go

@@ -2,7 +2,9 @@ package main
 
 import (
 	_ "embed"
+	"errors"
 	"os"
+	"os/exec"
 
 	"github.com/carapace-sh/carapace"
 	"github.com/pomdtr/smallweb/cmd"
@@ -15,6 +17,11 @@ func main() {
 	root := cmd.NewCmdRoot(changelog)
 	carapace.Gen(root)
 	if err := root.Execute(); err != nil {
+		var exitError *exec.ExitError
+		if errors.As(err, &exitError) {
+			os.Exit(exitError.ExitCode())
+		}
+
 		os.Exit(1)
 	}
 }