Update container installation scripts.

scripts/build_environment/Container/README

@@ -1 +1,3 @@
-For installing the container software itself, not building images.
+Scripts to install the container software itself, not building images.
+
+See Dockerfiles at https://github.com/geoschem/geos-chem-docker

scripts/build_environment/Container/install_docker_alinux.sh

@@ -0,0 +1,7 @@
+# /bin/bash
+# https://docs.aws.amazon.com/AmazonECS/latest/developerguide/docker-basics.html
+
+sudo yum update -y
+sudo amazon-linux-extras install -y docker
+sudo service docker start
+sudo usermod -a -G docker ec2-user

scripts/build_environment/Container/install_docker.sh → scripts/build_environment/Container/install_docker_ubuntu.sh

@@ -1,7 +1,6 @@
 #!/bin/bash
 # Install Docker-CE on AWS Ubuntu VM
 # https://docs.docker.com/install/linux/docker-ce/ubuntu/#install-using-the-repository
-# This is useful for building CharlieCloud images
 
 sudo apt-get update
 
@@ -27,5 +26,5 @@ sudo docker run --rm hello-world
 
 sudo usermod -aG docker $USER  # re-login, no need to use `sudo` before docker commands
 
-# for CharlieCloud
+# additional dependency for CharlieCloud
 sudo apt-get install -y gcc make python

scripts/build_environment/Container/install_singularity_alinux.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+# https://www.sylabs.io/guides/3.0/user-guide/installation.html#installation
+
+# Dependencies
+sudo yum update -y && \
+    sudo yum groupinstall -y 'Development Tools' && \
+    sudo yum install -y \
+    openssl-devel \
+    libuuid-devel \
+    libseccomp-devel \
+    wget \
+    squashfs-tools
+
+export VERSION=1.11 OS=linux ARCH=amd64 && \
+    wget https://dl.google.com/go/go$VERSION.$OS-$ARCH.tar.gz && \
+    sudo tar -C /usr/local -xzvf go$VERSION.$OS-$ARCH.tar.gz && \
+    rm go$VERSION.$OS-$ARCH.tar.gz
+
+echo 'export GOPATH=${HOME}/go' >> ~/.bashrc && \
+    echo 'export PATH=/usr/local/go/bin:${PATH}:${GOPATH}/bin' >> ~/.bashrc && \
+    . ~/.bashrc
+
+
+go get -u github.com/golang/dep/cmd/dep
+
+# Install singularity from source
+go get -d github.com/sylabs/singularity
+
+ export VERSION=v3.0.1 # or another tag or branch if you like && \
+    cd $GOPATH/src/github.com/sylabs/singularity && \
+    git fetch && \
+    git checkout $VERSION # omit this command to install the latest bleeding edge code from master
+
+./mconfig && \
+    make -C ./builddir && \
+    sudo make -C ./builddir install
+
+echo '. /usr/local/etc/bash_completion.d/singularity' >> ~/.bashrc