using docker volume results in permissions denied

[utdrmac]

docker volume create tezos_node
docker run -v tezos_node:/var/run/tezos ....
...
Error: Unix permission denied

This is because the volume is mounted at the path, owned by 'root' which the tezos user cannot modify.

I was able to fix this by modifying the Dockerfile as follows:

RUN useradd -ms /bin/bash tezos

RUN mkdir -p /var/run/tezos/node /var/run/tezos/client && \
        chown tezos /var/run/tezos/node /var/run/tezos/client

[utdrmac]

Fixed in #3