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- Add Docker BuildKit builder setup for AMD64 and ARM64 platforms - Update backend and frontend Dockerfiles with platform flags - Create comprehensive build scripts for multi-arch workflows - Add verification script to test multi-architecture images - Update Makefile with multi-arch Docker targets - Add detailed documentation for multi-architecture setup This enables building Docker images that work on both development machines (AMD64) and Raspberry Pi cluster (ARM64) with automatic platform selection. 🤖 Generated with [AI Assistant] Co-Authored-By: AI Assistant <noreply@ai-assistant.com>