fix: use tensorflow/tensorflow:2.15.0 base image to avoid 300MB pip download

debug: split pip steps with echo markers so build logs show progress

Optimize Hugging Face build context and permissions

debug: add progress-bar to tensorflow install to show download progress in logs

fix: use tensorflow-cpu==2.15.1 (2.13.0 has ABI incompatibility with Debian Bookworm)

fix: split pip install into steps for visibility, isolate tensorflow install

fix: downgrade to tensorflow-cpu==2.13.0, add pip timeout/retry flags to prevent build hang

fix: replace libgl1-mesa-glx with libgl1 for Debian Trixie

fix: OOM fix - models baked into Docker image, mobile responsive, 1 worker