change to centos-based docker and upgrade jekyll to 2.5.3

Dockerfile

-FROM debian
+FROM centos:latest
 
-RUN apt-get update && apt-get install -y git wget gcc make libssl-dev libreadline-dev zlib1g-dev vim bzip2 locales pandoc python2.7
+RUN yum install -y git wget gcc make openssl-devel readline-devel zlib-devel vim bzip2
+RUN yum install -y epel-release
+RUN yum install -y pandoc
 RUN useradd nscuser -M --shell /bin/bash
-WORKDIR /opt
+WORKDIR /usr/local/src
 RUN git clone https://github.com/snic-nsc/nscjekyllsetup.git
-WORKDIR /opt/nscjekyllsetup
-RUN git checkout 'v1.12'
+WORKDIR /usr/local/src/nscjekyllsetup
+RUN git checkout 'v1.16'
 RUN bash presetup.sh
 RUN bash setup.sh
 USER nscuser
-WORKDIR /opt/nscjekyllsetup
+WORKDIR /usr/local/src/nscjekyllsetup
 ENTRYPOINT /bin/bash

presetup.sh

@@ -4,6 +4,6 @@
 echo "en_US.UTF-8 UTF-8" >/etc/locale.gen
 locale-gen
 echo 'export LANG=en_US.UTF-8' >>/etc/bash.bashrc
-export 'RBENV_ROOT'=/opt/rbenv
+echo 'export LC_CTYPE=en_US.UTF-8' >>/etc/bash.bashrc
+export 'RBENV_ROOT'=/usr/local/src/rbenv
 echo "export PATH=$RBENV_ROOT/bin:$PATH" >>/etc/bash.bashrc
-ln -s /usr/bin/python2.7 /usr/bin/python

setup.sh

 #!/bin/bash
 
-cd /opt
+cd /usr/local/src
 git clone https://github.com/sstephenson/rbenv.git rbenv
 pushd rbenv
 git checkout 615f8443fe947f114fb358815b50978f6ab1881c
@@ -8,19 +8,17 @@ popd
 git clone https://github.com/sstephenson/ruby-build.git rbenv/plugins/ruby-build
 pushd rbenv/plugins/ruby-build
 git checkout 476d09b66a14392989c3c65793428742e1d9f951
-export PATH=/opt/rbenv/bin:$PATH
-export RBENV_ROOT=/opt/rbenv
+export PATH=/usr/local/src/rbenv/bin:$PATH
+export RBENV_ROOT=/usr/local/src/rbenv
 eval "$(rbenv init -)"
 rbenv install 2.4.1
 rbenv global 2.4.1
 gem update -f rdoc ri
-gem update
-gem install -v 2.1.1 jekyll
+gem install -v 2.5.3 jekyll
 gem install pandoc-ruby RedCloth
 rbenv install 2.4.0
 rbenv global 2.4.0
 gem update -f rdoc ri
-gem update
 gem install -v 3.5.2 jekyll
 gem install pandoc-ruby pygments.rb RedCloth jekyll-feed jekyll-paginate jekyll-paginate-multiple jekyll-redirect-from jekyll-sitemap
-chmod -R ugo+rx /opt/rbenv
+chmod -R ugo+rx /usr/local/src/rbenv

singularity/Singularity

 Bootstrap: docker
-From: debian
+From: centos:latest
 
 %post
-    apt-get update && apt-get install -y git wget gcc make libssl-dev libreadline-dev zlib1g-dev vim bzip2 locales pandoc python2.7
+    yum install -y git wget gcc make openssl-devel readline-devel zlib-devel vim bzip2
+    yum install -y epel-release
+    yum install -y pandoc
     mkdir -p /usr/local/src && cd /usr/local/src
     git clone https://github.com/snic-nsc/nscjekyllsetup.git
-    cd nscjekyllsetup && git checkout 'v1.14'
+    cd nscjekyllsetup && git checkout 'v1.16'
     bash presetup.sh
     bash setup.sh

singularity/docker-to-singularity/Singularity

 Bootstrap: docker
-From: pchengi/nscjekyll:v1.12
+From: pchengi/nscjekyll:v1.16