Feature/file upload

[bqle]

Students can now upload files and delete files associated with questions.

[codecov]

Codecov Report

Base: 99.01% // Head: 98.42% // Decreases project coverage by -0.58% ⚠️

Coverage data is based on head (b245f72) compared to base (f73ec90).
Patch coverage: 90.32% of modified lines in pull request are covered.

❗ Current head b245f72 differs from pull request most recent head bb8137e. Consider uploading reports for the commit bb8137e to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #214      +/-   ##
==========================================
- Coverage   99.01%   98.42%   -0.59%     
==========================================
  Files          25       26       +1     
  Lines        1316     1395      +79     
==========================================
+ Hits         1303     1373      +70     
- Misses         13       22       +9     

Flag	Coverage Δ
backend	98.42% <90.32%> (-0.59%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
backend/ohq/management/commands/createcourse.py	100.00% <ø> (ø)
backend/ohq/statistics.py	100.00% <ø> (ø)
backend/ohq/admin.py	85.00% <83.33%> (-15.00%)	⬇️
backend/ohq/permissions.py	98.30% <85.71%> (-0.81%)	⬇️
backend/ohq/views.py	97.88% <90.00%> (-1.30%)	⬇️
backend/ohq/forms.py	100.00% <100.00%> (ø)
backend/ohq/models.py	100.00% <100.00%> (ø)
backend/ohq/serializers.py	100.00% <100.00%> (ø)

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[bqle]

Will this automatically save to S3 instead of local?