Add dockerfile to renovate

[tangowithfoxtrot]

Type of change

• Bug fix
• New feature development
• Tech debt (refactoring, code cleanup, dependency upgrades, etc)
• Build/deploy pipeline (DevOps)
• Other

Objective

Add Dockerfile to renovate config. Needed to keep the base Rust image up-to-date.

Code changes

• .github/renovate.json: Add rules based on server repo.

Before you submit

• Please add unit tests where it makes sense to do so

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (8bed619) 59.44% compared to head (e4bd71f) 59.43%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #609      +/-   ##
==========================================
- Coverage   59.44%   59.43%   -0.01%     
==========================================
  Files         171      171              
  Lines       10324    10320       -4     
==========================================
- Hits         6137     6134       -3     
+ Misses       4187     4186       -1     

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[bitwarden-bot]

Checkmarx One – Scan Summary & Details – 0340ac13-9cc1-4a2d-a010-97170f92aaa0

No New Or Fixed Issues Found

[Hinton]

Nvm re-read again and this should be fine.