This pattern catches .env.local , .env.development.local , and .env.production.local , preventing accidental leaks to GitHub. Step 2: Create the File In the root directory of your project, create the file: touch .env.production.local Use code with caution. Step 3: Populate Variables
To protect yourself:
Leo opened a new terminal window. He typed:
process.env (System-level environment variables set on the hosting provider) .env.local.production
Environment variables are injected at for client-side code. If you modify your .env.local.production file, you must stop your local server, clear your build cache (like deleting the .next or dist folder), and run the build command again. Accidental Public Exposure
You should use this file when you need to test production-specific configurations locally on your machine without leaking secrets to your Git repository. 1. Local Testing of Production Builds
By placing a staging tracker token inside .env.production.local , your local next start execution will route data safely to a test dashboard. 3. Testing Server-Side Caching and ISR This pattern catches
.env.local.production is a file intended to hold environment variables that are loaded when a developer is running a "production" build on their local machine . The Hierarchy of Environment Variables
Its primary purpose is to provide for production-level configurations. Key Characteristics
Watch your terminal when you run next build or next start . He typed: process
# --- Application Configuration --- NODE_ENV=production APP_URL=https://your-production-domain.com # --- Database Credentials --- # Use highly secure, complex passwords for production databases DATABASE_URL=postgresql://db_user:highly_secure_password@db-host-address:5432/prod_db_name # --- API Keys & Secrets --- # NEXT_PUBLIC_ prefixes allow variables to be accessible in the browser NEXT_PUBLIC_API_URL=https://yourdomain.com STRIPE_SECRET_KEY=sk_live_XXXXXXXXXXXXXXXXXXXXXXXX AWS_ACCESS_KEY_ID=AKIAXXXXXXXXXXXXXXXX AWS_SECRET_ACCESS_KEY=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX # --- Authentication --- # Ensure these secrets are unique to production NEXTAUTH_SECRET=a_very_long_random_string_for_production NEXTAUTH_URL=https://your-production-domain.com # --- Logging & Monitoring --- LOG_LEVEL=error SENTRY_DSN=https://sentry.io Use code with caution. Copied to clipboard
# Accessible in both backend Node.js and frontend React/Vue components NEXT_PUBLIC_ANALYTICS_ID="UA-12345678-1" VITE_API_URL="https://productiondomain.com" Use code with caution.
To understand .env.local.production , you must understand how tools like Next.js load files based on priority: : Overrides all other files, loaded every time.