creaded correct docker image creation file

Dockerfile

@@ -5,11 +5,13 @@ FROM python:3.13-slim
 WORKDIR /app
 
 # Install system dependencies
+# Note: LibreOffice is excluded from the base image to reduce size (~500MB)
+# It can be installed on-demand via the Admin Panel → System Dependencies
 RUN apt-get update && apt-get install -y \
     poppler-utils \
-    libreoffice \
     ffmpeg \
     libmagic1 \
+    sudo \
     && rm -rf /var/lib/apt/lists/*
 
 # Copy requirements first for better caching
@@ -36,9 +38,11 @@ ENV FLASK_ENV=production
 # Expose port
 EXPOSE 5000
 
-# Create a non-root user
+# Create a non-root user and grant sudo access for dependency installation
 RUN useradd -m -u 1000 appuser && \
-    chown -R appuser:appuser /app /docker-entrypoint.sh
+    chown -R appuser:appuser /app /docker-entrypoint.sh && \
+    echo "appuser ALL=(ALL) NOPASSWD: /app/install_libreoffice.sh" >> /etc/sudoers && \
+    chmod +x /app/install_libreoffice.sh
 
 USER appuser