Make the app deployable to Render: configurable port, pnpm start, and render.yaml

[Copilot]

This PR makes the mlack app easily deployable to Render by implementing all the necessary infrastructure changes for production deployment.

Changes Made

1. Configurable Port

• Updated hono/index.ts to use the PORT environment variable with fallback to 3000
• Enables compatibility with Render's dynamic port assignment

const port = Number(process.env.PORT) || 3000;

2. Production Build System

• Created tsconfig.prod.json for production TypeScript compilation
• Updated package.json with new scripts:
  • build: Compiles TypeScript to JavaScript in dist/ directory
  • build:check: Type checking only (preserves existing behavior)
  • start:prod: Runs compiled JavaScript from dist/hono/index.js
• Fixed ES module imports to use .js extensions for Node.js compatibility

3. Render Deployment Configuration

• Added render.yaml with complete deployment configuration:
  • Uses pnpm for package management
  • Configures build and start commands for production
  • Sets up health check endpoint (/health)
  • Specifies Node.js 20 runtime
  • Enables automatic deployment

4. Development Environment Consistency

• Added .nvmrc file specifying Node.js 20
• Ensures consistent Node.js version across development and production

Testing

All existing functionality remains intact:

• ✅ All tests pass
• ✅ Development mode works with pnpm dev
• ✅ Production build compiles successfully
• ✅ Production server runs with pnpm run start:prod
• ✅ Port configuration works via environment variable
• ✅ Health endpoint responds correctly

Deployment Ready

The app can now be deployed to Render with minimal configuration - just connect the repository and Render will automatically use the render.yaml configuration for build and deployment.

Fixes #9.

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[mahata]

@copilot Fix the CI process in GitHub Actions.

[Copilot]

@copilot Fix the CI process in GitHub Actions.

Fixed the CI process! The issues were:

1. Node.js version inconsistency: CI was using Node.js 24 while .nvmrc specified 20
2. Linting failures: Missing newline in tsconfig.prod.json

Changes made:

• Updated CI workflow to use node-version-file: '.nvmrc' for consistency
• Fixed linting issues with automatic formatting

All CI steps now pass: tests ✅, linting ✅, and build ✅

Commit: 5b8828b

[mahata]

@copilot What's the purpose of this change?

[Copilot]

The .js extension was added to make the import compatible with Node.js ES modules when running the compiled JavaScript. TypeScript can resolve ./app but Node.js requires explicit file extensions for ES module imports when running the compiled code in production.