BE 유효성 검사를 추가한다

[hwanfront]

• *Joi: The most powerful schema description language and data validator for JavaScript.
• *validator: A library of string validators and sanitizers.

• Joi vs validator

• *express-validator: express-validator is a set of express.js middlewares that wraps the extensive collection of validators and sanitizers offered by validator.js.
• express-validation: express-validation is an express middleware that validates a request and returns a response with errors; if any of the configured validation rules fail.
• celebrate: celebrate is an express middleware function that wraps the joi validation library. This allows you to use this middleware in any single route, or globally, and ensure that all of your inputs are correct before any handler function. The middleware allows you to validate req.params, req.headers, and req.query.

• celebrate vs express-validation vs express-validator

  위는 js validator, 아래는 express validator

[hwanfront]

express-validator 쓰는 게 좋겠음