Reactive notifications service

Simple reactive notifications service using Webflux

MongoDB commands

use mongodb_example;
db.createCollection("notification", {capped: true, size: 100000})

Sample curls for add and get notifications

curl -X GET http://localhost:8080/notifications
curl -X POST http://localhost:8080/notifications -d '{ "message" : "Notification value"}' -H "Content-type: application/json"