Feat/backend/migrating image storage to azureblobs

[waveyboym]

Description

This pr proposes migration from storing images on mongodb database and storing as blobs on azure storage. The main benefits that this pr has introduced:

1. Significantly improved loading times for all images(nearly 0.0 sec for all qualities)
2. Significantly improved upload times (down from 7-10sec to 2-5sec)
3. Significantly reduced overall codebase
4. Eliminates need for caching images on ubuntu vm thereby introducing memory savings

Fixes # (issue)
#341

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Tested all updated endpoints using postman

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 12 lines in your changes missing coverage. Please review.

Project coverage is 81.32%. Comparing base (396ec41) to head (03e1545).
Report is 11 commits behind head on develop.

Files	Patch %	Lines
occupi-backend/pkg/database/database.go	0.00%	12 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #342      +/-   ##
===========================================
- Coverage    81.39%   81.32%   -0.07%     
===========================================
  Files           53       10      -43     
  Lines         3294     1869    -1425     
  Branches        81        0      -81     
===========================================
- Hits          2681     1520    -1161     
+ Misses         522      307     -215     
+ Partials        91       42      -49     

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