fix: run as root to allow volume mount writes

Dockerfile

@@ -11,11 +11,7 @@ RUN pip install --no-cache-dir -r requirements.txt
 
 COPY . .
 
-RUN mkdir -p $DATA_DIR \
+RUN mkdir -p $DATA_DIR
-    && adduser --disabled-password --gecos "" appuser \
-    && chown -R appuser:appuser /app
-
-USER appuser
 
 EXPOSE 2897