fix: remove apt-get step causing build freeze

Dockerfile

@@ -1,14 +1,8 @@
-# EpiRAG - Dockerfile for Hugging Face Spaces
 FROM python:3.11-slim
 
 WORKDIR /app
 
-# System deps for PyMuPDF
-RUN apt-get update && apt-get install -y --no-install-recommends \
-    libmupdf-dev gcc g++ \
-    && rm -rf /var/lib/apt/lists/*
-
-# Install Python deps
+# Install Python deps first 
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
@@ -22,9 +16,7 @@ COPY . .
 RUN useradd -m -u 1000 appuser && chown -R appuser /app
 USER appuser
 
-# HF Spaces default port
 EXPOSE 7860
-
 ENV EPIRAG_ENV=cloud
 
-CMD ["python", "server.py"]
+CMD ["python", "server.py"]