Some of the updated links had redirects in place,
Updating them to current paths to avoid relying on old redirects.
This is not an exhaustive update to all links,
just a few links that I happened to pick up on.
Signed-off-by: David Karlsson <35727626+dvdksn@users.noreply.github.com>
A few users of docker-perl have stumbled upon (and getting confused
with) the default /usr/bin/perl shipped by Debian, so put a short note
here explaining why it remains and also better describe how docker-perl
and its tooling is installed/configured.
Describe how Perl behaves when being run as PID 1 under containers,
particularly on receiving SIGTERM/SIGINT, showing example for explicit
signal handling.
Ref Perl/docker-perl#44
Using `perl:onbuild` might raise the suggestion that the Docker Perl
team is maintaining an official `onbuild` image, rather than point out
that the team merely suggests a use of the image for building a custom
variant.
For our example here, be explicit and use `perl:carton` instead.
David Karlsson