Added extra endpoint for clear cache

[agoalofalife]

Hi, like I mentioned before, I did extra endpoint for clear all cache. At the moment, i don't have enough time for change design code. I just need this endpoint for use API server.

[agoalofalife]

By the way, I will be able to update the documentation in readme.

[codecov-commenter]

Codecov Report

Merging #366 (596fa09) into main (cffbf48) will decrease coverage by 0.87%. The diff coverage is 27.27%.

:exclamation: Current head 596fa09 differs from pull request most recent head c34a2fa. Consider uploading reports for the commit c34a2fa to get more accurate results

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@@            Coverage Diff             @@
##             main     #366      +/-   ##
==========================================
- Coverage   90.03%   89.16%   -0.87%     
==========================================
  Files          15       15              
  Lines         783      794      +11     
==========================================
+ Hits          705      708       +3     
- Misses         66       73       +7     
- Partials       12       13       +1     

Impacted Files	Coverage Δ
server/server.go	29.41% <0.00%> (-0.90%)	:arrow_down:
server/cache_handlers.go	81.53% <30.00%> (-9.38%)	:arrow_down:

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[agoalofalife]

and then?

[janisz]

Thanks! I was waiting for tests to pass :)