Docker Build Diff — on-prem kit (this PC only)
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1. Extract this folder anywhere on your machine.
2. Needs: Docker + Python 3.10+
   Linux: you must be able to run `docker ps` without sudo.
3. Start UI + agent locally:

     ./start.sh

4. Open http://127.0.0.1:8765
5. Stop with: ./stop.sh

Both the web UI and the Docker agent run on this PC.
