What's the difference between WeChat Mini Programs's local background and web's local background?

the local backend I use on web is mongodb,express, plus proxy to solve cross-domain problems.
can WeChat Mini Programs"s local or future online backend use mongodb? what does the local backend need to change? I use Mini Program to send a request to my local backend of web. The console shows how net::ERR_CONNECTION_RESET, should be solved.

WeChat-Mini-Programs node.js express mongodb

Mar.06,2021

1. Mini Program can use mongo in the background.
2. Mini Program is the same as html, the front and rear ends are separated, whether you are aps or php or java or node. Mini Program will only care about the data returned by you in the background.
3. Mini Program only supports https domain names.
4. Mini Program wants to debug locally. You only need to parse [your modified Request URL]

in the local hosts.

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