Update Dockerfile

Dockerfile

@@ -5,7 +5,7 @@ RUN useradd -m -u 1000 user
 
 # Set working directory
 WORKDIR /app
-
+RUN mkdir -p /app/static/plots && chown -R user:user /app/static
 # Copy dependencies
 COPY --chown=user requirements.txt requirements.txt
 RUN pip install --no-cache-dir --upgrade -r requirements.txt