Too Long; Didn't Read
Setting up Environment Variables is the best practices in web dev world. But it seems troublesome for most people in practices, so few applied it. Well, it actually not that hard and it is necessary in most cases, let me show how you in this article. In this article, I will only focus on Javascript environment, I might update other languages once I figure them out later. Setting those up really dead simple, we should do it as early as possible (even in our first project)