What are common environment variables in Node.js?

What are common environment variables in Node.js?

Common environment variables in Node.js include NODE_ENV, PORT, and DATABASE_URL. NODE_ENV is often used to define the environment (development, production, etc.).

Can you explain what NODE_ENV does?

NODE_ENV is used to set the environment for your application. It helps in configuring settings for different environments, like development or production.

What about the PORT variable?

The PORT variable specifies the port number on which your Node.js application will listen for incoming requests. It's often set to 3000 or 8080.

Are there any other important environment variables I should know?

Yes, DATABASE_URL is crucial for connecting to your database, and API_KEY is often used for authentication with third-party services.