Add url validation:

Author: Joshua Zhou

middlewares/validators/checkin.validator.js

@@ -10,7 +10,7 @@ const checkinValidator = [
     body('formData.sponsorChallenges').isArray().withMessage('Sponsor challenges must be an array'),
     body('formData.workshopsAttended').isArray().withMessage('Workshops attended must be an array'),
     body('formData.discordTag').notEmpty().withMessage('Discord tag is required'),
-    body('formData.devpostLink').notEmpty().withMessage('Devpost link is required').isURL().withMessage('Devpost link must be a valid URL')
+    body('formData.devpostLink').notEmpty().withMessage('Devpost link is required')
 ];
 
 module.exports = checkinValidator;