Use the dotenv package. require('dotenv').config() or import 'dotenv/config' . Python: Use python-dotenv . PHP: Use phpdotenv .
If you accidentally commit a .env file, simply deleting it in a new commit isn't enough—it stays in the Git history. You must rotate your keys immediately and use a tool like BFG Repo-Cleaner to scrub the history. Use the dotenv package
You can pass a .env file directly using the --env-file flag. Common Pitfalls to Avoid how to use them correctly
Here is a deep dive into why .env files matter, how to use them correctly, and the "gotchas" you need to avoid. What is a .env File? Use the dotenv package