poc: push notification need to be introduced

[techoneel]

1. Study the introduction of push notification.
2. Find out the present available options for push notifications services in the market and their pricing(s)
3. Find out the available open source libraries and software(s) for hosting it on our server.

Expected Output: In a google spreadsheet

1. List of all the available service(s) with their links and pricing in the above sheet.
2. List of all the available open-source library and software(s) which can be hosted on our servers with their link in the above sheet.

[Rahul967]

kindly check
https://docs.google.com/spreadsheets/d/1JaiNwVGACL-vs58e-J3OCrgJNDUAttNmiuqu1u7QNqk/edit#gid=0

[Rahul967]

If we want to know about the new features added to RabbitMQ, Mosquitto, Kafka, and other message queue software in recent years, we can refer to some of these resources:

• RabbitMQ 3.9 Release Overview(https://blog.rabbitmq.com/) - RabbitMQ: This blog post introduces the new features and improvements in RabbitMQ 3.9, such as the new Raft-based quorum queues, the new single active consumer feature, the new Prometheus and Grafana integration, the new OAuth 2.0 support, and more.
• Mosquitto 2.0 Released(https://mosquitto.org/blog/2020/12/version-2-0-0-released/) - Eclipse Mosquitto: This blog post announces the release of Mosquitto 2.0, which brings significant changes and enhancements, such as the new dynamic security plugin, the new MQTT v5 support, the new WebSocket support, the new topic alias support, and more.
• What's New in Apache Kafka 3.0(https://www.confluent.io/blog/whats-new-in-apache-kafka-3-0/) - Confluent: This blog post highlights the new features and improvements in Apache Kafka 3.0, such as the new KRaft mode for controller quorum, the new ZooKeeper removal phase 1, the new incremental cooperative rebalancing for consumer groups, the new topic IDs for efficient replication and fetch protocols, and more.
• NATS 2.0 Release(https://nats.io/blog/nats-server-2-0-release/) - NATS: This blog post introduces the new features and capabilities of NATS 2.0, such as the new global superclusters, the new decentralized security model, the new JetStream persistence engine, the new leaf nodes for edge computing, and more.