.env.sample

A .env.sample (or .env.example) file is a template used in software development to define the environment variables a project requires without including sensitive data like real passwords or API keys. It serves as a blueprint for developers to set up their own local configuration. 1. Purpose and Usage

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REDIS_URL=redis://localhost:6379/0

1. Clear Headers

Use comments to group related variables. .env.sample

# ------------------------------
# Server Configuration
# ------------------------------
PORT=3000
HOST=localhost

URL for the primary API





  • Defaults only for non-sensitive settings.
    • 

  • Group related variables (database, auth, cache).
    • 

  • Minimal but complete: list every env var your app reads.
    • 


    Example .env.sample
    

    # App
APP_ENV=development
APP_DEBUG=true
APP_PORT=3000
# Database
DB_HOST=localhost
DB_PORT=5432
DB_NAME=myapp_db
DB_USER=myapp_user
DB_PASSWORD=changeme
# External API
EXTERNAL_API_URL=https://api.example.com
EXTERNAL_API_KEY=your-api-key-here
# Redis
REDIS_URL=redis://localhost:6379/0

    

    The Security Layer: Using .env.sample with Secret Managers
    

    In production, you should never have an .env file on disk. You use a secret manager (AWS Secrets Manager, HashiCorp Vault, Doppler, 1Password CLI). The .env.sample still plays a vital role here. Defaults only for non-sensitive settings
    

    You can use the sample file to define the schema for your secret manager. Tools like doppler allow you to run: The manager reads your sample
    

    doppler setup --template .env.sample

    

    The manager reads your sample, asks for the real values, and injects them securely without ever writing a physical .env file.

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