add "/tmp/" as csv file location

[valyo]

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1. Description / Summary

The new command flask send-usage fails on our production and testing instances with the following error:

OSError: [Errno 30] Read-only file system: 'snpseq_Usage_Months-11-to-11.csv

The reason is that in these environments we are running the containers as non-root (in contrast to our dev environment, separate task for this should be created and linked).

2. Jira task / GitHub issue

https://scilifelab.atlassian.net/browse/DDS-1845

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (034874a) 91.50% compared to head (3491e77) 91.50%.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #1499   +/-   ##
=======================================
  Coverage   91.50%   91.50%           
=======================================
  Files          29       29           
  Lines        4624     4625    +1     
=======================================
+ Hits         4231     4232    +1     
  Misses        393      393           

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[i-oden]

Question: Just double checking so that we're sure that the tmp folder in production is not emptied etc prior to us having the files?