Firebase backend

[AvivSela]

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[codecov-io]

Codecov Report

Merging #271 into master will increase coverage by 2.55%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #271      +/-   ##
==========================================
+ Coverage   93.96%   96.51%   +2.55%     
==========================================
  Files           3        5       +2     
  Lines         116      201      +85     
==========================================
+ Hits          109      194      +85     
  Misses          7        7

Impacted Files	Coverage Δ
firebase/backend/firebase_crud.py	100% <100%> (ø)
firebase/backend/firebase_documents.py	100% <100%> (ø)

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