docs(kubernetes): add tmp volume

[hackeryarn]

When trying to generate ebooks in a kubernetes hosted instance, I noticed a failure due to permissions in /tmp.

The best way to make sure that /tmp acts as expected, is to provide an emptyDir volume which will get cleaned up on container restart, which would be the expected behavior for a /tmp folder.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 34.28%. Comparing base (306487a) to head (d8a1e4f).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1040   +/-   ##
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  Coverage   34.28%   34.28%           
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  Files          61       61           
  Lines        5393     5393           
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  Hits         1849     1849           
  Misses       3320     3320           
  Partials      224      224           

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[fmartingr]

Thank you for fixing this part of the docs!

I used to have Shiori under kubernetes but went back to raw docker and then to LXC, so I miss all these issues since I can't test all configurations.

[hackeryarn]

@fmartingr I'll be running Shiori under kubernetes for the foreseeable future. I'll try to keep an eye out for any kubernetes related issues that pop up, but also feel free to tag me if you need help looking into any of those issues.

[fmartingr]

@fmartingr I'll be running Shiori under kubernetes for the foreseeable future. I'll try to keep an eye out for any kubernetes related issues that pop up, but also feel free to tag me if you need help looking into any of those issues.

Awesome, thank you. Likewise, let me know if there's something failing that I need to take a look into.