Docker Tutorial #8: Docker for Development — A Better Dev Environment
“Works on my machine” is a classic developer problem. One developer runs Python 3.11, another runs 3.13. One uses PostgreSQL 15, another uses 16. The app behaves differently on every machine. Docker solves this. With Docker, your entire development environment — app, database, cache, message queue — is defined in a YAML file. Every developer on your team runs identical environments with one command. Why Use Docker for Development? Consistent environments — everyone runs the same versions of everything No installation required — no need to install PostgreSQL, Redis, or Node locally Easy onboarding — new team members run docker compose up and have everything Clean isolation — each project has its own versions, no conflicts between projects Production parity — dev environment matches production as closely as possible The Development Compose Pattern A common pattern is to have two Compose files: ...