Error while bulding a docker image - bionic-cran40/ release

Hi, i’ve this issue while I was building an docker image for an app.
image

E: The repository ‘https://cloud.r-project.org/bin/linux/ubuntu bionic-cran40/ Release’ does not have a Release file.

Someone can help me?

This is my dockerfile

FROM openanalytics/r-base

MAINTAINER Joaquin Tavella “joaquintavella@gmail.com
ENV http_proxy ‘http://10.250.5.1:8080
ENV https_proxy ‘https://10.250.5.1:8080

system libraries of general use

RUN apt-get update && apt-get install -y
sudo
libcurl4-gnutls-dev
libcairo2-dev
libxt-dev
libssl-dev
libssh2-1-dev
libxml2-dev

system library dependency for the euler app

RUN apt-get update && apt-get install -y
libmpfr-dev

basic shiny functionality

RUN R -e “install.packages(c(‘shiny’,‘tidyverse’ ,‘data.table’, ‘lubridate’, ‘stringr’,'openxlsx,‘highcharter’,‘shinydashboard’,‘shinyjs’,‘formattable’,‘ggplot2’,‘scales’,‘wordcloud’,‘RColorBrewer’),repos=‘https://cloud.r-project.org/’)”

copy the app to the image

RUN mkdir /root/jubidashuno
COPY Beneficios /root/jubidashuno

COPY Rprofile.site /usr/lib/R/etc/

EXPOSE 3838

CMD [“R”, “-e”, “shiny::runApp(’/root/jubidashuno’)”]