Update Dockerfile

Dockerfile

@@ -1,3 +1,9 @@
+FROM python:3.10-slim
+
+ENV DEBIAN_FRONTEND=noninteractive
+WORKDIR /home/user/app
+
+# System deps
 RUN apt-get update && apt-get install -y --no-install-recommends \
     wget curl git build-essential cmake pkg-config \
     libcairo2-dev libpango1.0-dev libfreetype6-dev libglib2.0-dev \
@@ -6,3 +12,29 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     fontforge \
     fonts-dejavu fonts-liberation fonts-noto fonts-noto-cjk fonts-thai-tlwg \
     && rm -rf /var/lib/apt/lists/* && apt-get clean
+
+# Build pdf2htmlEX from source
+RUN git clone --depth 1 https://github.com/pdf2htmlEX/pdf2htmlEX.git /tmp/pdf2htmlEX \
+    && cd /tmp/pdf2htmlEX \
+    && mkdir build && cd build \
+    && cmake .. -DCMAKE_INSTALL_PREFIX=/usr \
+    && make -j"$(nproc)" \
+    && make install \
+    && rm -rf /tmp/pdf2htmlEX
+
+# Create non-root user
+RUN useradd -m -u 1000 user
+USER user
+
+# Python deps
+COPY --chown=user:user requirements.txt .
+RUN pip install --no-cache-dir --upgrade pip \
+    && pip install --no-cache-dir -r requirements.txt
+
+# App code
+COPY --chown=user:user . .
+
+RUN mkdir -p /home/user/app/temp /home/user/app/output
+
+EXPOSE 7860
+CMD ["python", "app.py"]