"scripts": "start:dev": "NODE_ENV=development node index.js", "start:prod": "NODE_ENV=production node index.js" Use code with caution. 3. Load the Dynamic File
: Water use, energy consumption, and waste/recycling programs.
Generally, you don't need quotes unless the value contains spaces.
jobs: deploy: runs-on: ubuntu-latest steps: - uses: actions/checkout@v4 - name: Create .env-production from secrets run: | echo "DATABASE_URL=$ secrets.PROD_DATABASE_URL " >> .env-production echo "API_KEY=$ secrets.PROD_API_KEY " >> .env-production echo "DEBUG=false" >> .env-production - name: Deploy to server run: scp .env-production user@server:/app/ "scripts": "start:dev": "NODE_ENV=development node index
Vite automatically loads .env files based on the current mode. Running vite loads .env-development , while vite build loads .env-production . Note that Vite requires variables to be prefixed with VITE_ (e.g., VITE_API_URL ) to prevent accidental exposure of private keys to the public browser.
The most critical rule of .env files is: If you push your .env file to a public repository, your API keys are compromised within seconds by bots. Always add .env to your .gitignore file immediately. 2. Use a .env.example Template
With .env- files, the correct URL is injected at the environment level, keeping your code pure and environment‑agnostic. Generally, you don't need quotes unless the value
Do not create .env files inside your CI/CD pipeline using plaintext secrets. Use the CI/CD platform’s built-in "Secrets" or "Environment Variables" feature.
You can have different .env files for different environments. For example, your local machine might use DB_HOST=localhost , while your production server uses DB_HOST=prod-db-server .
Start small: introduce .env-development and .env-production in your next project. Use a loading library appropriate for your stack. Automate validation and secret injection in CI/CD. Soon, you’ll wonder how you ever lived with a single .env file. Note that Vite requires variables to be prefixed
from pydantic_settings import BaseSettings, SettingsConfigDict
If you accidentally commit a .env file, simply deleting it in a new commit isn't enough—it stays in the Git history. You must rotate your keys immediately and use a tool like BFG Repo-Cleaner to scrub the history.
# Server Configuration PORT=3000 NODE_ENV=development # Database Connection DATABASE_URL=mongodb://localhost:27017/mydatabase DB_PASSWORD=supersecretpassword # API Keys STRIPE_SECRET_KEY=sk_test_4eC39HqLyjWDarjtT1zdp7dc Use code with caution.
.gitignore entry: .env .env.*.local