Update Dockerfile

Dockerfile

@@ -1,5 +1,16 @@
 FROM python:3.10
 
+# -------------------------------------------------------
+# NEW: Install System Dependencies for PDF Image Fallback
+# This must run as root before creating the user.
+# 'poppler-utils' is required for pdf2image to work.
+# -------------------------------------------------------
+USER root
+RUN apt-get update && apt-get install -y \
+    poppler-utils \
+    libgl1 \
+    && rm -rf /var/lib/apt/lists/*
+
 ### Set up user with permissions
 # Set up a new user named "user" with user ID 1000
 RUN useradd -m -u 1000 user
@@ -14,18 +25,17 @@ ENV HOME=/home/user \
 # Set the working directory to the user's home directory
 WORKDIR $HOME/app
 
-# Copy the current directory contents into the container at $HOME/app setting the owner to the user
-COPY --chown=user . $HOME/app
+# Copy requirements first to leverage Docker cache
+COPY --chown=user requirements.txt requirements.txt
+RUN pip3 install --no-cache-dir --upgrade -r requirements.txt
 
-### Set up app-specific content
-COPY requirements.txt requirements.txt
-RUN pip3 install -r requirements.txt
-
-COPY . .
+# Copy the current directory contents into the container
+COPY --chown=user . $HOME/app
 
 ### Update permissions for the app
+# Temporarily switch to root to fix permissions (Hugging Face specific)
 USER root
-RUN chmod 777 ~/app/*
+RUN chmod -R 777 $HOME/app
 USER user
 
 CMD ["python", "main.py"]