feat: added HPA, CICD, and monitoring using HELM

[iamamash]

What does this PR do?

I've implemented the following changes in my PR:

1. Horizontal Pod Autoscaler (HPA): Enabled auto-scaling based on CPU utilization for improved resource efficiency.

2. GitHub Actions for CD: Established a secure CD environment using GitHub Actions with encrypted Secrets and Env Variables.

3. Monitoring Enhancements: Integrated Helm for comprehensive application monitoring using Prometheus and Grafana.

4. Custom Metrics for HPA: Implemented HPA based on custom metrics (incoming requests), noting compatibility issues with AWS EKS and HPA's autoscaling/v2beta2.

Type of changes

• Successfully introduced a feature encompassing pod autoscaling, comprehensive monitoring, and seamless deployment, marking a significant accomplishment in enhancing the project's scalability, observability, and deployment efficiency.

Mandatory Tasks

• Make sure you have self-reviewed the code. A decent size PR without self-review might be rejected.

[LondheShubham153]

great work @iamamash

do add the changes to README.md so that learners can understand your features

[iamamash]

Updated the README.md @LondheShubham153 Sir.