docker: run app as non-root user

Dockerfile

@@ -11,10 +11,16 @@ FROM python:3.12-slim
 
 WORKDIR /app
 
+RUN useradd -u 10001 -m appuser
+
 COPY --from=builder /usr/local/lib/python3.12/site-packages /usr/local/lib/python3.12/site-packages
 
 COPY . .
 
 RUN rm -rf /root/.cache
 
+RUN mkdir -p /app/logs /app/data && chown -R appuser:appuser /app/logs /app/data
+
+USER appuser
+
 CMD ["python", "main.py"]