Adding 'data' directory to Dockerfile

Dockerfile

@@ -16,8 +16,10 @@ ARG TARGETPLATFORM
 ENV PATH=/opt/conda/bin:$PATH
 
 RUN mkdir .cache
+RUN mkdir data
 # I'm not sure how to allow later python files used here to write to .cache without making it world-writeable.
 RUN chmod 777 -R .cache
+RUN chmod 777 -R data
     
 RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
         build-essential \