[WIP] A Tangled spindle hosted on Fly.io

add docker_host env var

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Dockerfile
··· 24 24 ENV SPINDLE_SERVER_HOSTNAME=$HOSTNAME 25 25 ENV SPINDLE_SERVER_OWNER=$DID 26 26 27 + ENV DOCKER_HOST=tcp://localhost:2375 28 + 27 29 EXPOSE 6555 28 30 29 31 CMD ["spindle"]