add utf8 to create database

src/app.module.ts

@@ -42,6 +42,7 @@ config({ path: '.env' });
       username: process.env.DB_USERNAME,
       password: process.env.DB_PASSWORD,
       database: process.env.DB_NAME,
+      charset: 'utf8mb4',
       synchronize: true,
       entities: [
         Carrera,