github-actions

Create a workflow file at .github/workflows/ci.yml that checks out code, installs dependencies, and runs tests. GitHub Actions workflows automate testing and deployment tasks. Start with a basic pipeline, then iteratively add security checks, caching, and parallelization to optimize performance.

GitHub Actions security best practices include managing permissions restrictively, securing secrets properly, and avoiding untrusted actions. Performance optimization involves caching dependencies, parallelizing jobs, and reducing workflow runtime. These practices reduce risk and improve CI/CD pipeline speed.

Yes, GitHub Actions supports deploying Ruby/Rails and TypeScript/Node.js applications to platforms like Heroku and Fly.io. Workflows can automate the entire deployment pipeline from testing to production release across these frameworks and hosting services.

Evaluate workflow failures by reviewing logs, checking job outputs, and validating workflow syntax. GitHub Actions provides detailed failure diagnostics. Common issues include missing dependencies, incorrect permissions, secret configuration errors, and platform-specific deployment constraints.

Workflows are automated processes defined in YAML files that orchestrate jobs and steps across events. Custom actions are reusable components you create to encapsulate logic. Both combine to build flexible, maintainable CI/CD pipelines and reduce workflow duplication.