MONGODB
one document: { id: 1, //Integer city: 'Vancouver', //String name: 'Spider man', //String image: 'spiderman.jpg' //String }
{ id: 2, city: 'Vancouver', name: 'Batman', image: 'batman.jpg' }
collection of documentd: [{ id: 1, name: 'Spider man', image: 'spiderman.jpg' },{ id: 2, name: 'Batman', image: 'batman.jpg' }]