Add an example node-cache implementation in docs

[sinarck]

I recently wrote some code in my own project that utilizes node-cache, and thought it might be helpful for anyone else who stumbled across the docs. I'm not sure if my implementation is actually useful or correct, so any feedback would be helpful.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.26%. Comparing base (a30f8d2) to head (ac727bf).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #841 +/- ## ======================================= Coverage 99.26% 99.26% ======================================= Files 19 19 Lines 2442 2442 Branches 212 211 -1 ======================================= Hits 2424 2424 Misses 17 17 Partials 1 1 ```

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[arthurfiorette]

there's syntax errors in your example

[sinarck]

Should be good now.

[arthurfiorette]

thanks!