added arborist.js file & support for npm auth token for arborist lib to scan private deps

pkg/common/utils/command.go

@@ -3,11 +3,13 @@ package utils
 import (
 	"bytes"
 	"fmt"
+	"os"
 	"os/exec"
 )
 
-func ExecCmd(name string, args []string) error {
+func ExecCmd(name string, args, env []string) error {
 	cmd := exec.Command(name, args...)
+	cmd.Env = append(os.Environ(), env...)
 
 	var stdout, stderr bytes.Buffer
 	cmd.Stdout = &stdout

pkg/common/utils/config.go

@@ -9,3 +9,7 @@ func ApiKey() string {
 func TenantDomain() string {
 	return os.Getenv("SAFEDEP_TENANT_ID")
 }
+
+func NpmAuthToken() string {
+	return os.Getenv("NPM_AUTH_TOKEN")
+}