add controller and service for create user

src/helpers/security/password/hash.ts

@@ -0,0 +1,6 @@
+import bcrypt from "bcrypt";
+
+export const hashPassword = async (password: string): Promise<string> => {
+  const saltRounds = Number(process.env.SALT_ROUNDS);
+  return await bcrypt.hash(password, saltRounds);
+};