How do I deploy an Express app using environment variables?
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How do I deploy an Express app using environment variables?
To deploy an Express app with environment variables, you can use a .env file to store your variables and the dotenv package to load them.
Can you show me how to set up the .env file?
Sure! Create a file named .env in your project root and add your variables like this:
PORT=3000
DB_URL=mongodb://localhost:27017/mydb
Make sure to add .env to your .gitignore file.
How do I access these variables in my app?
You can access them using process.env.VARIABLE_NAME. For example, to get the PORT, use const port = process.env.PORT;.
What if I want to deploy it on Heroku?
On Heroku, you can set environment variables using the Heroku dashboard or the CLI with heroku config:set VARIABLE_NAME=value.
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