feat(instance): server image computed attribute

[Mia-Cross]

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 19 lines in your changes missing coverage. Please review.
✅ Project coverage is 2.31%. Comparing base (c12e061) to head (a9ff07c).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
internal/services/instance/server.go	0.00%	19 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##           master   #3719      +/-   ##
=========================================
- Coverage    2.31%   2.31%   -0.01%     
=========================================
  Files         469     469              
  Lines       51425   51441      +16     
=========================================
  Hits         1192    1192              
- Misses      50140   50156      +16     
  Partials       93      93              

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