.env.sample -

# API keys API_KEY_GOOGLE=YOUR_GOOGLE_API_KEY API_KEY_GITHUB=YOUR_GITHUB_API_KEY

While .env.sample is widely used, you may also encounter these equivalent filenames: .env.sample

DATABASE_URL=postgresql://user:password@localhost:5432/database_name API_KEY=your_api_key_here NODE_ENV=development PORT=3000 .env.sample