chore(build): Add dependabot docker ecosystem check

[Jorann]

Let dependabot check for docker dependency updates.

This will rename the Containerfile to Dockerfile, otherwise it won't work, see: dependabot/dependabot-core#6067

[github-actions]

unit-test-results

 7 files  ±0  24 suites  ±0   1m 23s ⏱️ -4s
50 tests ±0  49 ✅ ±0  1 💤 ±0  0 ❌ ±0 
58 runs  ±0  56 ✅ ±0  2 💤 ±0  0 ❌ ±0 

Results for commit bc8fd20. ± Comparison against base commit 08c4a77.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (08c4a77) 3.77% compared to head (bc8fd20) 3.77%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##              main    #423   +/-   ##
=======================================
  Coverage     3.77%   3.77%           
  Complexity     224     224           
=======================================
  Files          770     770           
  Lines        15796   15796           
  Branches       822     822           
=======================================
  Hits           597     597           
  Misses       15142   15142           
  Partials        57      57           

☔ View full report in Codecov by Sentry.
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[github-actions]

integration-test-results

 6 files  ±0   6 suites  ±0   4s ⏱️ ±0s
13 tests ±0  13 ✅ ±0  0 💤 ±0  0 ❌ ±0 
14 runs  ±0  14 ✅ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit bc8fd20. ± Comparison against base commit 08c4a77.

♻️ This comment has been updated with latest results.

[edgarvonk]

nice