Dockerfile

FROM ruby:2.3.0

MAINTAINER "Yoshihiro Ashida <y4ashida@gmail.com>"

## Use Debian unstable via pinning -- new style via APT::Default-Release
RUN echo "deb http://http.debian.net/debian sid main" > /etc/apt/sources.list.d/debian-unstable.list \
    && echo 'APT::Default-Release "testing";' > /etc/apt/apt.conf.d/default

## Now install R and littler, and create a link for littler in /usr/local/bin
## Also set a default CRAN repo, and make sure littler knows about it too
RUN apt-get update \
    && apt-get install -t unstable -y --no-install-recommends \
        littler \
                r-cran-littler \
        r-base=${R_BASE_VERSION}* \
        r-base-dev=${R_BASE_VERSION}* \
        r-recommended=${R_BASE_VERSION}* \
        && echo 'options(repos = c(CRAN = "https://cran.rstudio.com/"), download.file.method = "libcurl")' >> /etc/R/Rprofile.site \
        && echo 'source("/etc/R/Rprofile.site")' >> /etc/littler.r \
    && ln -s /usr/share/doc/littler/examples/install.r /usr/local/bin/install.r \
    && ln -s /usr/share/doc/littler/examples/install2.r /usr/local/bin/install2.r \
    && ln -s /usr/share/doc/littler/examples/installGithub.r /usr/local/bin/installGithub.r \
    && ln -s /usr/share/doc/littler/examples/testInstalled.r /usr/local/bin/testInstalled.r \
    && install.r docopt \
    && rm -rf /tmp/downloaded_packages/ /tmp/*.rds \
    && rm -rf /var/lib/apt/lists/*

# ============= #

# Set the applilcation directory
WORKDIR /app

# Copy our code from the current folder to /app inside the container
COPY . /app
RUN gem i bundle
RUN bundle
RUN su - -c "R -e \"install.packages('lavaan', dependencies=TRUE, repos='http://cran.at.r-project.org/')\""

# Make port 80 available for publish
EXPOSE 80

# Start server
CMD ["bundle", "exec", "rackup", "--host", "0.0.0.0", "-p", "80"]