How to Build a Consistent Local Dev Environment with Docker Compose in 2026

A Docker Compose setup can give every developer an identical local environment running Postgres, Redis, and email testing with a single command. The configuration uses service health checks to ensure the app container waits for Postgres to be fully ready before starting, preventing common connection errors. A dedicated Makefile wraps common tasks like migrations, seeding, database resets, and shell access into short commands. On macOS, using named volumes instead of host-mounted ones for node_modules and build caches significantly improves performance by keeping files within Docker's Linux VM. The setup also separates environment variables into a committed template file and a local secrets file that is never pushed to version control.