Sending GitLab CI Pipeline Notifications with Nexmo Messages

The GitLab CI/CD pipeline includes a series of stages such as build, deploy, and notify that are triggered by the push of code to GitLab. The notification stage is particularly useful in case of failures, where it can be configured to send SMS notifications using Nexmo's API. To set up this functionality, environment variables need to be created for the Nexmo account information, such as the API key and secret, and a Node.js application needs to be set up with webhooks that receive messages from Nexmo. The application uses these webhooks to send SMS notifications when the pipeline fails, providing valuable feedback to the development team. Additionally, the Messages API can be used to send messages through other platforms such as Facebook Messenger, Viber, and WhatsApp, offering more flexibility in messaging techniques.