Fix Docker stuff to work with CPAN

docker/Dockerfile

@@ -1,9 +1,6 @@
 FROM perl:latest
-LABEL maintainer="dave@perlhacks.org"
+LABEL maintainer="dave@davecross.co.uk"
 
-COPY . /links
-RUN cd /links && cpanm --installdeps .
-RUN mkdir /linkdir
-ENV PATH "$PATH:/links/bin"
-ENV PERL5LIB /links/lib
-WORKDIR /linksdir
+RUN cpanm -n App::LinkSite@0.0.3
+RUN mkdir /links
+WORKDIR /links

docker/build

@@ -1,6 +1,6 @@
 #!/bin/sh
 
-# ver=`perl -nE '/\@v?([\d\.]+)/ and print $1 and exit' Dockerfile`
-# echo Building version $ver
-docker build -t davorg/links:latest -f docker/Dockerfile .
+ver=`perl -nE '/\@v?([\d\.]+)/ and print $1 and exit' docker/Dockerfile`
+echo Building version $ver
+docker build -t davorg/links:latest -t davorg/links:links_$ver -f docker/Dockerfile .
 docker push -a docker.io/davorg/links