.env.development May 2026

"scripts": "dev": "node scripts/validate-dev-env.js && NODE_ENV=development nodemon src/index.js"

# docker-compose.yml version: '3.8' services: api: build: . env_file: - .env.development ports: - "$PORT:3000" Now, running docker-compose up automatically injects your dev variables. You can create scripts that modify behavior based on the presence of .env.development . .env.development

# settings.py import environ env = environ.Env() environ.Env.read_env(os.path.join(BASE_DIR, '.env.development')) To prevent your project from descending into "environment variable hell," follow these battle-tested principles. 1. Always Commit .env.development (With Care) This is a controversial point. You should not commit .env.production (it contains secrets). However, .env.development should be committed to your repository because it contains no real secrets—only local URLs, mock keys, and safe defaults. Committing it ensures all developers on your team have the same baseline configuration. "scripts": "dev": "node scripts/validate-dev-env

If you have ever cloned a repository, run npm install , and then spent 30 minutes trying to figure out why the API calls are failing, you have felt the pain of missing or misconfigured environment files. This article is your complete guide to understanding, implementing, and mastering .env.development . Before diving into the specific file, let's establish the foundation. An .env file (short for "environment") is a simple text file containing key-value pairs that define environment variables for your application. # settings