如何使用mongoDB搜索索引？
我目前正在学习使用节点JS，Express JS，MongoDB和Pug构建网站。我跟随 mozilla tutorial 基本原理，现在我想添加一个搜索栏。
我想从MongoDB搜索功能中获利，但是3-4天后，我仍在篮子案中。
谁能解释应该如何完成？该代码完全如教程/示例网站所述。
另外，我真的不明白整个事情是如何工作的，是否可以更轻松地添加功能或“获得”更好的方法？调试器是我从未见过的变量的海洋，对示例的丝毫改动使整个事情都沉没了。我在里面哭。任何帮助或资源都非常受欢迎。
这是指向公共回购的链接（因为它是博客文章的很多代码）。
I am currently learning to build websites using Node JS, Express JS, MongoDB and PUG. I followed the Mozilla tutorial to understand the fundamentals and now I want to add a search bar.
I would like to profit from MongoDB search functionalities, but after 3-4 days, I am still at basket case.
Can anyone explain how it is supposed to be done? The code is exactly as described in the tutorial/example website.
Also, I really don't understand how this whole thing works, are there easier features to add or ways to 'get it' better? The debugger is an ocean of variables as I have never seen, and the slightest alterations to the example makes the whole thing sink. I am crying inside. Any help or resource is very welcomed.
Here is a link to a public repo (since it's a lot of code for a blog post).
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