Do not use the home directory as the working dir in docker (#9834)

* Do not create a home directory.

* Re-add -m flag

scripts/docker/hub/Dockerfile

@@ -20,12 +20,8 @@ RUN groupadd -g 1000 parity \
 
 USER parity
 
-WORKDIR /home/parity
-
-ENV PATH "~/bin:${PATH}"
-
 #add TARGET to docker image
-COPY artifacts/x86_64-unknown-linux-gnu/$TARGET ./bin/$TARGET
+COPY artifacts/x86_64-unknown-linux-gnu/$TARGET /bin/$TARGET
 
 # Build a shell script because the ENTRYPOINT command doesn't like using ENV
 RUN echo "#!/bin/bash \n ${TARGET} \$@" > ./entrypoint.sh