docs(example): add sample implementation of job queue

[codecov-commenter]

Codecov Report

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

Comparison is base (1bbdc90) 90.24% compared to head (1fce547) 90.37%.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #98 +/- ## ========================================== + Coverage 90.24% 90.37% +0.12% ========================================== Files 15 15 Lines 810 810 ========================================== + Hits 731 732 +1 + Misses 52 51 -1 Partials 27 27 ```

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