G1Joshi Heroku
Heroku remains the simplest way to deploy full-stack apps. The 2025 "Fir" generation runs on AWS Graviton (ARM) and integrates native AI capabilities.
When to Use
- Simplicity: "Git Push Heroku Master". No K8s, no Dockerfiles (optional).
- Stateful Apps: Heroku Postgres is arguably the best managed Postgres service in existence for developer experience (DX).
- MVP: Fastest time to market for Rails/Django/Node apps.
Quick Start
heroku create
git push heroku main
# Add Postgres
heroku addons:create heroku-postgresql:standard-0
Core Concepts
Dynos
Lightweight Linux containers. Pro/Enterprise dynos sleep only when told. 2025 includes Performance-L (Large) and Eco types.
Buildpacks
Scripts that detect your language (e.g. package.json -> Node) and build the app.
Releases
Atomic deployments. You can instant-rollback to v42 if v43 breaks.
Best Practices (2025)
Do:
- Use Environment Variables: 12-Factor App methodology is native to Heroku.
- Use Review Apps: Spin up a temp Heroku app for every Pull Request automatically.
- Use Docker (Container Registry): If Buildpacks fail you, push a Docker image.
Don't:
- Don't use local filesystem: Dynos are ephemeral. Files written to disk vanish on restart. Use S3.