.env file make in nodejs

1. Install the dotenv package using npm: bash npm install dotenv

2. Create a .env file in the root of your Node.js project.

3. Add your environment variables to the .env file. For example: DB_HOST=localhost DB_USER=admin DB_PASSWORD=secret

4. In your Node.js application, require the dotenv package at the top of your main file: javascript require('dotenv').config();

5. Access the environment variables in your code using process.env: javascript const dbHost = process.env.DB_HOST; const dbUser = process.env.DB_USER; const dbPassword = process.env.DB_PASSWORD;

6. Use the variables in your application as needed.

Note: Make sure to add the .env file to your .gitignore to avoid exposing sensitive information, and provide a sample .env.example file with placeholders for others to follow.