Follow symlinks when copying to /bin

[ryansch]

On rancherOS /bin is a symlink to /usr/bin. Adding -L causes docker cp to follow that symlink. Without it, we get a not a directory error and fsevents fails to start.

[morganick]

I can confirm that this does fix the issue.

[codekitchen]

Darn, I was worried about some of this not working for people who aren't using the default VM but don't have a great way to test such configurations. Thanks for the fix.

The docs for docker cp say the -L flag means "Always follow symbol link in SRC_PATH", but it sounds like you're saying it follows links in DEST_PATH as well?

I'll cut a new Dinghy release this evening.

[ryansch]

Yeah we tested it in situ and discovered that -L works on the DEST_PATH side too.

[ryansch]

@codekitchen I have at least one more PR for you.

[codekitchen]

Sounds good, I'll hold off