Dockerfile references files that are not in this repo

[SvenDowideit]

clone the repo, run

docker build . and you get

debconf: falling back to frontend: Teletype
Processing triggers for libc-bin (2.23-0ubuntu10) ...
Processing triggers for ca-certificates (20170717~16.04.2) ...
Updating certificates in /etc/ssl/certs...
148 added, 0 removed; done.
Running hooks in /etc/ca-certificates/update.d...
done.
Removing intermediate container 746725d242b5
 ---> 9c492d584d63
Step 3/16 : ADD bin/dumb-init /usr/local/bin
ADD failed: stat /var/lib/docker/tmp/docker-builder398262277/bin/dumb-init: no such file or directory

[SvenDowideit]

and of course, in step2 I look at these files, and see they're binaries - looks like an easy "fix" - PR coming up :)

[yuzs2]

how can we find the "linux-rc" folder?