Upload folder using huggingface_hub

Add disclaimer banner for HuggingFace deployment

Remove HF_HUB_OFFLINE: causes tableformer hang at runtime

Fix model cache: shared HF_HOME + offline mode at runtime

Warm up all models at build time with dummy PDF conversion

Pre-download Docling models at build time

Fix nginx: replace main config to listen on port 7860

Initial deploy: Docling Studio (local mode, port 7860)