[New] Introduce Docker environment for nvm

Dockerfile

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+# Dockerized nvm development environment
+#
+# This Dockerfile is for building nvm development environment only,
+# not for any distribution/production usage.
+#
+# Please note that it'll use about 1.2 GB disk space and about 15 minutes to
+# build this image, it depends on your hardware.
+
+# Use Ubuntu Trusty Tahr as base image as we're using on Travis CI
+# I also tested with Ubuntu 16.04, should be good with it!
+From ubuntu:14.04
+MAINTAINER Peter Dave Hello <hsu@peterdavehello.org>
+
+# Prevent dialog during apt install
+ENV DEBIAN_FRONTEND noninteractive
+
+# Pick a Ubuntu apt mirror site for better speed
+# ref: https://launchpad.net/ubuntu/+archivemirrors
+ENV UBUNTU_APT_SITE ubuntu.cs.utah.edu
+
+# Disable src package source
+RUN sed -i 's/^deb-src\ /\#deb-src\ /g' /etc/apt/sources.list
+
+# Replace origin apt pacakge site with the mirror site
+RUN sed -E -i "s/([a-z]+.)?archive.ubuntu.com/$UBUNTU_APT_SITE/g" /etc/apt/sources.list
+RUN sed -i "s/security.ubuntu.com/$UBUNTU_APT_SITE/g" /etc/apt/sources.list
+
+# Install apt packages
+RUN apt update         && \
+    apt upgrade -y -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold"  && \
+    apt install -y -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold"     \
+        coreutils             \
+        util-linux            \
+        bsdutils              \
+        file                  \
+        openssl               \
+        ca-certificates       \
+        ssh                   \
+        wget                  \
+        patch                 \
+        sudo                  \
+        htop                  \
+        dstat                 \
+        vim                   \
+        tmux                  \
+        curl                  \
+        git                   \
+        jq                    \
+        realpath              \
+        zsh                   \
+        ksh                   \
+        ghc                   \
+        gcc-4.8               \
+        g++-4.8               \
+        cabal-install         \
+        build-essential       \
+        bash-completion       && \
+    apt-get clean
+
+# Set locale
+RUN locale-gen en_US.UTF-8
+
+# Print tool versions
+RUN bash --version | head -n 1
+RUN zsh --version
+RUN ksh --version || true
+RUN dpkg -s dash | grep ^Version | awk '{print $2}'
+RUN git --version
+RUN curl --version
+RUN wget --version
+RUN cabal --version
+
+# Add user "nvm" as non-root user
+RUN useradd -ms /bin/bash nvm
+
+# Set sudoer for "nvm"
+RUN echo 'nvm ALL=(ALL) NOPASSWD: ALL' >> /etc/sudoers
+
+# Switch to user "nvm" from now
+USER nvm
+
+# Shellcheck
+RUN cabal update
+RUN cabal install ShellCheck
+RUN ~/.cabal/bin/shellcheck --version
+RUN echo 'export PATH="~/.cabal/bin/:${PATH}"'                                >> $HOME/.bashrc
+
+# nvm
+COPY . /home/nvm/.nvm/
+RUN sudo chown nvm:nvm -R $HOME/.nvm
+RUN echo 'export NVM_DIR="$HOME/.nvm"'                                        >> $HOME/.bashrc
+RUN echo '[ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh"  # This loads nvm' >> $HOME/.bashrc
+RUN echo '[ -s "$NVM_DIR/bash_completion" ] && . "$NVM_DIR/bash_completion" # This loads nvm bash_completion' >> $HOME/.bashrc
+
+# nodejs and tools
+RUN bash -c 'source $HOME/.nvm/nvm.sh   && \
+    nvm install node                    && \
+    npm install -g doctoc urchin        && \
+    npm install --prefix "$HOME/.nvm/"'
+
+# Set WORKDIR to nvm directory
+WORKDIR /home/nvm/.nvm
+
+ENTRYPOINT /bin/bash
+