Set default file size to 0 for attachments

Author: ThomasKranitsas

app-bootstrap.js

@@ -8,4 +8,4 @@ Joi.optionalId = () => Joi.string().uuid()
 Joi.id = () => Joi.optionalId().required()
 Joi.page = () => Joi.number().integer().min(1).default(1)
 Joi.perPage = () => Joi.number().integer().min(1).max(100).default(20)
-Joi.fileSize = () => Joi.number().integer().min(0)
+Joi.fileSize = () => Joi.number().integer().min(0).default(0)