Kubernetes Deployment

[ruien0412]

This pull request introduces a comprehensive Kubernetes deployment setup for the project, along with significant improvements to the Docker build and release workflow. It adds Kubernetes manifests and documentation, refines Dockerfile usage for multi-architecture builds, and updates CI workflows to automate building and publishing Docker images from prebuilt binaries.

The most important changes are:

Kubernetes Deployment Support:

• Added a full set of Kubernetes manifests in the k8s/ directory, including deployment, service, ingress, configmap, secret, namespace, and kustomization files for both the API and Sandbox components. This enables easy deployment and management of the application on Kubernetes clusters. [1] [2] [3] [4] [5] [6]
• Introduced a detailed Kubernetes deployment guide in K8S_DEPLOYMENT.md, covering prerequisites, configuration, deployment steps, troubleshooting, scaling, and best practices.

Docker and CI/CD Improvements:

• Added new Dockerfiles (Dockerfile.prebuilt, Dockerfile.sandbox.prebuilt) for building images from prebuilt binaries, supporting multi-architecture (amd64, arm64) builds and simplifying the image build process. [1] [2]
• Updated the GitHub Actions workflow to build and upload prebuilt binaries as artifacts, and added a new workflow to build and push Docker images automatically when a release is completed. [1] [2]

Build and Runtime Adjustments:

• Modified existing Dockerfiles to avoid copying a local .env.local file (which may not exist in CI/CD), replacing it with a touch command to ensure the file is present at runtime. [1] [2]

These changes together enable automated, reproducible, and scalable deployments using Kubernetes, while also streamlining the build and release process for both local development and production environments.