try explicitly setting $HOME in dockerfile
@@ -46,4 +46,5 @@ RUN apt-get update && apt-get -y install --no-install-recommends \
&& rm -rf /var/lib/apt/lists/*
RUN apt-get update && apt-get -y install --no-install-recommends curl unzip
USER ${UID}
+ENV HOME=/home/grapl
WORKDIR /home/grapl
