# .gitignore .env .env.local .env.production # Do NOT add .env.sample to .gitignore Use code with caution. Step 4: Document the Setup
Demystifying .env.sample: The Essential Guide to Secure Environment Management
The .env file is where actual configuration values live—database passwords, API keys, secret tokens, and environment-specific settings. This file must never be committed to version control. By adding .env , .env.local , and .env.production to your .gitignore , you keep sensitive credentials out of your repository where they could be exposed.
: Organize your file by service or function (e.g., Database, Authentication, API Keys) to improve readability. Stay Up-to-Date : Every time you add a new process.env variable to your code, update the .env.sample immediately. Tools like gen-env-template can help automate this. The Security Golden Rule .env.sample
require('dotenv').config();
The .env.sample (or .env.example ) file is a template that lists all required environment variables with placeholder values. It is and serves as living documentation for your application's configuration needs. When a new developer joins the project, they copy .env.sample to .env and fill in their actual values.
# .env.sample # ========================================= # NEVER commit your actual .env file to version control! # Copy this file to .env and fill in your own values. # ========================================= By adding
The format is simple:
This template is effective because it does three things: (1) provides clear warnings, (2) distinguishes required from optional variables, and (3) includes helpful comments and links.
# MUST be a comma-separated list of origins without trailing slashes ALLOWED_CORS_ORIGINS=http://localhost:3000,https://myapp.com Use code with caution. Automating Configuration Checks Tools like gen-env-template can help automate this
The primary purpose of .env.sample is to:
If you answered yes to these, you’ve mastered the humble .env.sample . Your future self and your teammates will thank you.