feat: Wolfi-based Docker images

[khvn26]

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Changes

Use Wolfi OS as the base Docker image to avoid CVEs introduced by Debian base images.

How did you test this code?

Ran Docker build locally.
Ran the unit test suite and the E2E suite against the built image.

[vercel]

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3 Skipped Deployments

Name	Status	Preview	Comments	Updated (UTC)
docs	⬜️ Ignored (Inspect)	Visit Preview		Jul 8, 2024 2:48pm
flagsmith-frontend-preview	⬜️ Ignored (Inspect)	Visit Preview		Jul 8, 2024 2:48pm
flagsmith-frontend-staging	⬜️ Ignored (Inspect)	Visit Preview		Jul 8, 2024 2:48pm

[github-actions]

Uffizzi Preview deployment-53759 was deleted.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.60%. Comparing base (1fa4990) to head (3f537b4).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4276   +/-   ##
=======================================
  Coverage   96.60%   96.60%           
=======================================
  Files        1195     1195           
  Lines       39099    39099           
=======================================
  Hits        37773    37773           
  Misses       1326     1326           

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[github-actions]

flagsmith-e2e image build finished ✨

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-e2e:pr-4276	Finished ✅	Skipped

[github-actions]

flagsmith image build and security scan finished ✨

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith:pr-4276	Finished ✅	Results ✅

[github-actions]

flagsmith-api image build and security scan finished ✨

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-api:pr-4276	Finished ✅	Results ✅

[github-actions]

flagsmith-frontend image build and security scan finished ✨

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-frontend:pr-4276	Finished ✅	Results ✅

[github-actions]

flagsmith-private-cloud image build and security scan finished ✨

Image	Build Status	Security report
ghcr.io/flagsmith/flagsmith-private-cloud:pr-4276	Finished ✅	Results ✅

[matthewelwell]

This looks good to me. I'm not sure what considerations we need to make before merging @khvn26 ?

[khvn26]

@matthewelwell

1. We need to make sure private cloud scenarios involving lxml work correctly.
2. We need to test real-time flags on staging.