Create ReviewImages model. migrations, and seeders

[yoshelb]

• [x] Model name is ReviewImage
• [x] table name is ReviewImages
• [x] table attributes: npx sequelize-cli model:generate --name ReviewImage --attributes reviewId:integer,url:string
• [x] find all constraints/ validations and add them to Model and migration
• [x] add options object to migrations and seeders
• [x] define associations
• [ ] add validations to Express validator
• [ ] validation message: "message": "Maximum number of images for this resource was reached"
• [x] create seeders