feat(deployment): add helm chart and improve docker configuration

[ScribblerCoder]

Add Kubernetes Deployment Support with Helm Chart

Overview

This PR adds comprehensive Kubernetes deployment capabilities for the GitHub Access Token Server, including a complete Helm chart and Docker improvements.

Changes Made

Docker Improvements

• Standardized Dockerfile syntax for better maintainability
• Added missing environment variable in README.md

Helm Chart for Kubernetes Deployment

Added a complete Helm chart (server/deployments/helm/) with:

• Chart.yaml - Chart metadata and versioning (v0.1.0)
• values.yaml - Comprehensive configuration options
• Kubernetes Templates:
  • deployment.yaml - Main application deployment
  • service.yaml - Service configuration
  • serviceaccount.yaml - Service account with RBAC
  • ingress.yaml - Ingress controller support
  • hpa.yaml - Horizontal Pod Autoscaler
  • httproute.yaml - Gateway API HTTPRoute support

Usage

helm install github-access-token ./server/deployments/helm -f ./server/deployments/helm/values.yaml

[ScribblerCoder]

@qoomon Am I right to assume that the server is stateless? I currently have autoscaling enabled with multiple replicas in my setup (its disabled by default here in this PR)

[Copilot]

Pull Request Overview

This PR adds Kubernetes deployment support by introducing a comprehensive Helm chart for the GitHub Access Token Server, along with Docker configuration improvements for better standardization and deployment readiness.

• Complete Helm chart implementation with templates for deployment, service, ingress, HPA, and Gateway API support
• Docker improvements including standardized syntax (uppercase AS in multi-stage builds, = in ENV declarations)
• Added missing GITHUB_ACTIONS_TOKEN_ALLOWED_AUDIENCE environment variable in README documentation

Reviewed Changes

Copilot reviewed 16 out of 16 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
server/deployments/helm/Chart.yaml	Defines chart metadata and version (v0.1.0) for the Helm package
server/deployments/helm/values.yaml	Provides comprehensive configuration options with defaults for all Kubernetes resources
server/deployments/helm/templates/_helpers.tpl	Contains Helm template helper functions for naming and labels
server/deployments/helm/templates/deployment.yaml	Defines the main application deployment with environment configuration
server/deployments/helm/templates/service.yaml	Creates Kubernetes service for pod exposure
server/deployments/helm/templates/serviceaccount.yaml	Sets up service account with RBAC support
server/deployments/helm/templates/ingress.yaml	Configures ingress controller for external access
server/deployments/helm/templates/httproute.yaml	Adds Gateway API HTTPRoute support as alternative to Ingress
server/deployments/helm/templates/hpa.yaml	Enables horizontal pod autoscaling based on CPU/memory metrics
server/deployments/helm/templates/extra-manifests.yaml	Allows deployment of additional custom Kubernetes objects
server/deployments/helm/templates/tests/test-connection.yaml	Provides Helm test for connection verification
server/deployments/helm/templates/NOTES.txt	Displays post-installation instructions with ASCII art and access URLs
server/deployments/helm/README.md.gotmpl	Template for generating Helm chart documentation
server/deployments/helm/README.md	Generated documentation with values table and usage instructions
server/Dockerfile	Standardized multi-stage build syntax and environment variable format
server/README.md	Added missing environment variable in Docker run example

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[qoomon]

@qoomon Am I right to assume that the server is stateless? I currently have autoscaling enabled with multiple replicas in my setup (its disabled by default here in this PR)

Yes completely stateless. It's designed to run in serverless functions or lambdas

[ScribblerCoder]

Did a force push to sign my commits and fix author name (forgot to do so)

[ScribblerCoder]

@qoomon let me know if you need me to add a workflow to lint/release the chart and the docker image.

[ScribblerCoder]

hey @qoomon any updates or if you have any comments on this PR?

[qoomon]

hi @ScribblerCoder sorry for the late response.
Unfortunately I don't have any experience with helm charts so far.
And because it's quite a huge PR I can not validate nor support the helm chart deployment.
However if you like I can mention your helm chart repository in the README file