addy-ci-cd-and-automation

Create a workflow file at .github/workflows/ci.yml that runs on pull requests and pushes to main. Use actions/checkout and actions/setup-node with npm caching, then run lint, tsc --noEmit, tests with coverage, build, and npm audit as sequential quality gates.

Define a postgres service container in the job with health checks using pg_isready, then pass the DATABASE_URL pointing to localhost:5432. Store the database password in GitHub Secrets rather than hardcoding it, even for CI-only test databases.

A complete pipeline runs lint, type checking, unit tests, build, integration tests, optional E2E tests, security audit, and bundle size checks. No gate should be skipped; failures must block merge through branch protection rules.

Slow pipelines usually lack dependency caching and run jobs sequentially. Apply caching via setup-node, split lint, typecheck, and test into parallel jobs, use path filters to skip unrelated jobs, and shard test suites with matrix builds.

Yes, add a deploy-preview job conditioned on pull_request events that runs a deployment command like npx vercel with a token stored in GitHub Secrets. Every PR then gets an isolated preview URL for manual testing before merge.

Use feature flags to decouple deployment from release when shipping incomplete or risky features. Flags let you disable functionality without redeploying, run canary rollouts, and A/B test, but set a cleanup date so flags do not become technical debt.