Add complete Helm chart example for Kubernetes deployment

[dimaby]

Summary

This pull request adds a complete Helm chart example for deploying the project in Kubernetes. It includes configurations for deployments, services, and ingress. Please review and provide feedback.

Change Type

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• [*] New feature (non-breaking change which adds functionality)
• [*] This change requires a documentation update

Testing

I tested the Helm chart manually by deploying it in a Kubernetes cluster using k3s. Below are the steps to reproduce the test:

1. Ensure you have a running Kubernetes cluster and Helm installed on your system.

2. Prepare the Configuration Files:

   • Before deploying the chart, rename the files values.yaml.example and librechat-config.yaml.example by removing .example from the file names.
   • Fill in your parameters in the values.yaml and librechat-config.yaml files.

3. Deploy the Helm Chart:

   • Use Helm to deploy the chart to your Kubernetes cluster.

     cd chart
     helm upgrade --install --namespace librechat --create-namespace --values values.yaml librechat .

4. Access the Application:

   • Access the application through NodePort 30080.

Test Configuration:

• Kubernetes Version: Server Version: v1.28.8+k3s1
• Helm Version: v3.12.3

Test Configuration:

• Kubernetes Version: Server Version: v1.28.8+k3s1
• Helm Version: v3.12.3

Checklist

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[danny-avila]

Thanks a lot! I hope to try it soon

[danny-avila]

going to close this in favor of #2879

Please feel free to improve or adjust the merged helm chart as needed