Update and modernize container

.gitlabci/setup.sh

-#!/bin/bash
-
-apt-get update && apt-get install -y wget git \
-                                          build-essential \
-                                          squashfs-tools \
-                                          libtool \
-                                          autotools-dev \
-                                          libarchive-dev \
-                                          automake \
-                                          autoconf \
-                                          uuid-dev \
-                                          libssl-dev \
-                                          python-pip
-
-
-## Somehow sed cant find /etc/sudoers
-#sed -i -e 's/^Defaults\tsecure_path.*$//' /etc/sudoers
-
-# Check Python
-
-echo "Python Version:"
-python --version
-pip install sregistry[all]
-sregistry version
-
-echo "sregistry Version:"
-
-# Install Singularity
-
-cd /tmp && \
-    rm -rf singularity && \
-    git clone -b vault/release-2.5 https://www.github.com/sylabs/singularity.git
-    cd singularity && \
-    ./autogen.sh && \
-    ./configure --prefix=/usr/local && \
-    make -j8 && make install