chore(docker): add packages/utils to app and realtime Dockerfiles #4229

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Final Result: Bugbot completed review - no issues found! ✅

Request ID: serverGenReqId_578224df-a950-4716-bd46-48b65042837e

✅ Bugbot reviewed your changes and found no new issues!

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^{Reviewed by Cursor Bugbot for commit add1ac0. Configure here.}