feat(file-tool): add djvu conversion and extraction actions

services/router/Dockerfile

@@ -2,6 +2,11 @@ FROM python:3.11-slim
 
 WORKDIR /app
 
+# System packages for file conversions
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    djvulibre-bin \
+    && rm -rf /var/lib/apt/lists/*
+
 # Install dependencies
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
@@ -33,4 +38,3 @@ CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]
 
 
 
-