Update Dockerfile

Dockerfile

@@ -1,22 +1,33 @@
-# Use an official Python runtime as a parent image
-FROM python:3.10-slim
+# Use a more robust Python runtime as a parent image (Bookworm instead of Slim)
+FROM python:3.10-bookworm
 
 # Set environment variables
 ENV PYTHONUNBUFFERED=1 \
     PYTHONDONTWRITEBYTECODE=1 \
     HOME=/home/user \
-    PATH=/home/user/.local/bin:$PATH
+    PATH=/home/user/.local/bin:$PATH \
+    HF_HOME=/home/user/.cache/huggingface \
+    DOCLING_MODELS_CACHE=/home/user/.cache/docling/models
 
 # Create a non-root user
 RUN useradd -m -u 1000 user
 WORKDIR $HOME/app
 
-# Install system dependencies
+# Install critical system dependencies for Docling, OpenCV, and OCR
+# libgl1-mesa-glx and libglib2.0-0 are for OpenCV
+# libsm6, libxext6, libxrender1 are for UI-less PDF processing
+# tesseract-ocr is for fallback OCR layers
+# libmagic1 is for file type detection
 RUN apt-get update && apt-get install -y \
     build-essential \
     libgomp1 \
-    libgl1 \
+    libgl1-mesa-glx \
     libglib2.0-0 \
+    libsm6 \
+    libxext6 \
+    libxrender1 \
+    tesseract-ocr \
+    libmagic1 \
     && rm -rf /var/lib/apt/lists/*
 
 # Install requirements
@@ -26,6 +37,10 @@ RUN pip install --no-cache-dir -r requirements.txt
 # Copy the application code and set ownership
 COPY --chown=user:user . .
 
+# Ensure cache directories exist and are writable by the user
+RUN mkdir -p .llama_cache $HF_HOME $DOCLING_MODELS_CACHE && \
+    chown -R user:user $HOME
+
 # Switch to the non-root user
 USER user