Feat/49 51 random images

[bewee]

Closes #49, Closes #51, Closes #52

Changes made by this Pull Request

• Display images in random order in frontend
• Add some ECG images

Definition of Done

• [x] Tests are written and run successful
• [x] Code is documented
• [x] User Manual is updated
• [x] All requirements of the user story are met

[codecov-commenter]

Codecov Report

Merging #66 (2431bd4) into dev (b75cb9e) will increase coverage by 0.23%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              dev      #66      +/-   ##
==========================================
+ Coverage   99.16%   99.39%   +0.23%     
==========================================
  Files           5        7       +2     
  Lines         120      166      +46     
==========================================
+ Hits          119      165      +46     
  Misses          1        1              

Impacted Files	Coverage Δ
api/mod/src/routers/debug.py	97.29% <ø> (-0.08%)	:arrow_down:
api/mod/src/app.py	100.00% <100.00%> (ø)
api/mod/src/models/annotation.py	100.00% <100.00%> (ø)
api/mod/src/models/task.py	100.00% <100.00%> (ø)
api/mod/src/routers/images.py	100.00% <100.00%> (ø)
api/mod/src/routers/tasks.py	100.00% <100.00%> (ø)

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