Add node-fs-json example

[IQ9999999]

Some inspiration from daily data preprocessing & data cleaning.

[linux-foundation-easycla[bot]]

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• :white_check_mark: login: IQ9999999 / name: IQ9999999 (fdac8bee32bbdaf881dfecbaa845d69436b3adbd, 80f86926c52c843f13093efa675cb4265bddddd7)

[IQ9999999]

This repo is to help demonstrate common configurations using Mocha.

I feel the node-fs-json example is node.js usage rather than mocha configuration.

Why do you think it is helpful for others?

I think it can demonstrate to others. Check if a file is created. Whether the information in the document meets the requirements.

[outsideris]

I mean for common configurations, especially how to configure mocha with other tools or libraries to run test. Not specific test case like file, regex, Date or String.