Dockerfile: put back EXPOSE directive (#12279)

[Rkt](https://coreos.com/rkt) doesn't allow ports to be exposed to containers unless they are declared in the container manifest. Re-adding EXPOSE back in (removed in 1dbf993bce) allows the container to be used on rkt based systems.
main
David Caldwell 5 years ago committed by Eugen Rochko
parent 23ed9303b8
commit 3b609da9bd

@ -123,3 +123,4 @@ RUN cd ~ && \
# Set the work dir and the container entry point
WORKDIR /opt/mastodon
ENTRYPOINT ["/tini", "--"]
EXPOSE 3000 4000

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