Docker image build error

After this operation, 103 MB of additional disk space will be used.
WARNING: The following packages cannot be authenticated!
  r-base-core r-cran-boot r-cran-cluster r-cran-foreign r-cran-mass
  r-cran-kernsmooth r-cran-lattice r-cran-nlme r-cran-matrix r-cran-mgcv
  r-cran-rpart r-cran-survival r-cran-class r-cran-nnet r-cran-spatial
  r-cran-codetools r-recommended r-base r-base-dev r-base-html r-doc-html
E: There were unauthenticated packages and -y was used without --allow-unauthenticated
The command '/bin/sh -c echo "$LOG_TAG Install R related packages" &&     echo "deb http://cran.rstudio.com/bin/linux/ubuntu xenial/" | tee -a /etc/apt/sources.list &&     gpg --keyserver keyserver.ubuntu.com --recv-key E084DAB9 &&     gpg -a --export E084DAB9 | apt-key add - &&     apt-get -y update &&     apt-get -y install r-base r-base-dev &&     R -e "install.packages('knitr', repos='http://cran.us.r-project.org')" &&     R -e "install.packages('ggplot2', repos='http://cran.us.r-project.org')" &&     R -e "install.packages('googleVis', repos='http://cran.us.r-project.org')" &&     R -e "install.packages('data.table', repos='http://cran.us.r-project.org')" &&     apt-get -y install libcurl4-gnutls-dev libssl-dev &&     R -e "install.packages('devtools', repos='http://cran.us.r-project.org')" &&     R -e "install.packages('Rcpp', repos='http://cran.us.r-project.org')" &&     Rscript -e "library('devtools'); library('Rcpp'); install_github('ramnathv/rCharts')"' returned a non-zero code: 100