uses cpanm instead of cpm to install outdated modules

The list is going to be empty in most cases.
This is a safety to make sure all deps installed
before we start are up to date.

This is avoiding the error from cpm:
    “Need arguments or cpanfile”

Author: atoomic

Dockerfile

@@ -18,6 +18,6 @@ RUN cpanm -nq App::cpm Carton::Snapshot
 
 RUN cpm install -g --show-build-log-on-failure --cpanfile /tmp/cpanfile
 
-RUN cpan-outdated --exclude-core -p | xargs -n 1 cpm install -g --show-build-log-on-failure
+RUN cpan-outdated --exclude-core -p | xargs -n1 cpanm
 
 CMD ["/bin/bash"]