Install the dependencies via apt-get to save time

cpanm is still run to catch the missing ones (if any)

docker/Dockerfile

@@ -11,18 +11,26 @@
 FROM ubuntu:16.04
 
 RUN apt-get update -y \
- && apt-get install git build-essential curl sqlite3 mysql-client libmariadb-client-lgpl-dev libpq-dev libexpat1-dev graphviz -y \
- && apt-get install netcat.openbsd vim perl-doc -y \
+                       # Needed to clone the checkout and use cpanm
+ && apt-get install -y cpanminus git build-essential \
+		       # Database-related dependencies
+                       sqlite3 libdbd-sqlite3-perl postgresql-client libdbd-pg-perl mysql-client libdbd-mysql-perl libdbi-perl \
+		       # Required Perl modules
+		       libcapture-tiny-perl libdatetime-perl libhtml-parser-perl libjson-perl \
+		       # Perl modules needed for the test-suite
+		       libtest-exception-perl libtest-simple-perl libtest-warn-perl libtest-warnings-perl libtest-file-contents-perl libtest-perl-critic-perl libgraphviz-perl \
+		       # Recommendations
+		       libgetopt-argvfile-perl libchart-gnuplot-perl libbsd-resource-perl \
  && apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
-# RUN apt-get install iputils-ping net-tools apt-file -y
+## Useful for debugging
+# RUN apt-get install netcat.openbsd vim perl-doc iputils-ping net-tools apt-file -y
 
 RUN ln -s /usr/bin/mariadb_config /usr/bin/mysql_config
 
-RUN curl -L https://cpanmin.us | perl - App::cpanminus
-
 RUN mkdir /repo && git clone -b master https://github.com/Ensembl/ensembl-hive.git /repo/ensembl-hive
 
+# Install the missing dependencies (if any)
 RUN cpanm --installdeps --with-recommends /repo/ensembl-hive
 
 	# for the processes you run in an interactive bash