Update Dockerfile

Author: avikdatta

python_docker_for_ubuntu/Dockerfile

@@ -31,13 +31,27 @@ RUN apt-get -y update && \
  gfortran \
  mysql-client-5.7 \
  sqlite3 \
+ littler \
+ r-cran-littler \
  r-base \
  r-base-dev \
+ r-recommended \
  libsqlite3-dev
- 
+
 RUN locale-gen en_US.UTF-8
 RUN dpkg-reconfigure locales
 
+RUN 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/*
+ 
+
 RUN useradd -m -s /bin/bash -N -u $NB_UID $NB_USER && \
  groupadd $NB_GROUP && \
 usermod -a -G $NB_GROUP $NB_USER