Add poppler-utils for PDF processing

Dockerfile

@@ -2,40 +2,41 @@
 FROM python:3.10-slim
 
 # Set environment variables
-# PYTHONDONTWRITEBYTECODE: Prevents Python from writing pyc files to disc
-# PYTHONUNBUFFERED: Ensures logs are flushed immediately
 ENV PYTHONDONTWRITEBYTECODE=1 \
     PYTHONUNBUFFERED=1 \
-    # Point Hugging Face cache to a writable directory
     HF_HOME=/app/.cache/huggingface
 
 # Set the working directory
 WORKDIR /app
 
-# Create a non-root user with a specific UID (1000) for security & HF compatibility
-# and give them ownership of the /app directory
+# --- NEW: Install System Dependencies (Poppler) ---
+# We update apt, install poppler-utils, and clean up to keep the image small
+RUN apt-get update && apt-get install -y \
+    poppler-utils \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create a non-root user with a specific UID (1000)
 RUN useradd -m -u 1000 user && \
     chown -R user:user /app
 
 # Switch to the non-root user
 USER user
 
-# Set up the PATH to include the user's local bin (where pip installs tools)
+# Set up the PATH
 ENV PATH="/home/user/.local/bin:$PATH"
 
-# Copy the requirements file first to leverage Docker cache
+# Copy requirements
 COPY --chown=user:user requirements.txt .
 
 # Install dependencies
 RUN pip install --no-cache-dir --upgrade pip && \
     pip install --no-cache-dir -r requirements.txt
 
-# Copy the rest of the application code
+# Copy application code
 COPY --chown=user:user . .
 
-# Expose port 7860 (Required for Hugging Face Spaces)
+# Expose port 7860
 EXPOSE 7860
 
 # Command to run the application
-# Note: Ensure your main file is named 'main.py' and the app instance is 'app'
 CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860"]