DevOps45-70 min
Docker Compose Development Environment
Create a repeatable local environment with service dependencies, volumes, ports, and health checks.
Docker ComposePostgreSQLRedisNode.js
Prerequisites
- Docker Desktop or Docker Engine installed.
- A backend app that connects to database or Redis services.
- Local environment variables for service URLs.
1
Plan the implementation
Start by choosing the exact page, route, API, or deployment surface you want to improve. A narrow target makes the implementation measurable and easier to verify.
- Write down the current behavior and the user-facing problem it creates.
- Pick one measurable success signal such as bundle size, latency, error rate, security coverage, or UI responsiveness.
- Identify the files, routes, providers, and environment variables involved.
- Create a rollback note before changing production-sensitive configuration.
2
Set up the required tools
Install or configure only the tools needed for this implementation. Keep config close to the feature so future developers can find the moving parts quickly.
Implementation snippet
docker compose versionChecklist
- Dependencies are added to the correct workspace package.
- Environment variables are documented in `.env.example` when needed.
- Local development still starts without production-only secrets.
- The change is small enough to review in one pull request.
3
Implement the core pattern
- Create a compose file with app, database, and cache services.
- Map only the ports needed for local development.
- Use volumes for database persistence.
- Load local variables through `.env` without committing secrets.
- Document startup, reset, and log commands.
Implementation snippet
services:
api:
build: .
ports: ["3000:3000"]
env_file: .env
depends_on: [db, redis]
db:
image: postgres:16
environment:
POSTGRES_PASSWORD: postgres
ports: ["5432:5432"]
redis:
image: redis:7
ports: ["6379:6379"]4
Handle edge cases
Checklist
- A new developer can start the stack with one command.
- Database data persists across container restarts.
- Service URLs match application env variables.
- Reset commands are documented and clearly destructive.
5
Verify before production
- Run the app locally and test the normal success path.
- Test one failure path, one empty state, and one slow-network or retry path.
- Run the project build and any related unit or integration tests.
- Check browser console, server logs, and network responses for hidden warnings.
- Document the final behavior, commands used, and any follow-up work.