Overwrite user gid

main.go

@@ -52,7 +52,12 @@ func EntryPoint(command []string) error {
 		)
 	}
 
-	err = syscall.Setgroups([]int{int(uid), int(dockerGid)})
+	err = syscall.Setgroups([]int{int(dockerGid)})
+	if err != nil {
+		return err
+	}
+
+	err = syscall.Setgid(int(uid))
 	if err != nil {
 		return err
 	}