feat: setup CI/CD for Google Cloud Run with WIF

[kimcascante]

🚀 Pull Request

🔗 Close #276

📋 Description

This PR implements the CI/CD pipeline for Google Cloud Run using GitHub Actions and Workload Identity Federation (WIF). It includes the necessary Docker configuration and deployment workflows to automate the build and release process.

Changes

• Dockerfile: Added a multi-stage Dockerfile optimized for Next.js 15, including support for pnpm and build-time environment variables.
• Workflow: Created .github/workflows/deploy.yml which handles authentication with GCP using WIF, builds the image, pushes it to Artifact Registry, and deploys to Cloud Run.
• Next Config: Enabled output: 'standalone' in next.config.ts to reduce container image size and improve performance.

Technical Details

• Security: Uses Workload Identity Federation (WIF) instead of static JSON service account keys.
• Efficiency: Multi-stage Docker build ensures the final image only contains production dependencies and the standalone server.
• Scalability: Automated deployment ensures that every merge to main is reflected in the Cloud Run service.

Setup Requirements (Cloud Side)

1. Ensure the Artifact Registry repository skillcert exists in us-central1.
2. Configure WIF in GCP to allow this repository to impersonate the GitHub Actions service account.
3. Add the following secrets to GitHub:
   • GCP_PROJECT_ID
   • GCP_WIF_PROVIDER
   • GCP_WIF_SERVICE_ACCOUNT

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🙏 Thank you for your work!

[Jeffrey0522]

@kimcascante Please resolve conflicts

[kimcascante]

@Jeffrey0522 done