How to Fix Shiny App Local Browser Issue? - docker

Question

I have a shiny app that works fine when I run the app through RStudio. Everything loads fine on http://127.0.0.1:xxxx, however I don't see the app when I click on "Open in Browser". Is this a generic issue that has a workaround? If you think the ui and server code is need, I can provide that.
I am trying to fix this above issue because I think this could be the reason that my docker image for this app is not showing up on http://localhost .
Here is the Dockerfile:
FROM r-base:3.5.0
# Install Ubuntu packages
RUN apt-get update && apt-get install -y \
sudo \
gdebi-core \
pandoc \
pandoc-citeproc \
libcurl4-gnutls-dev \
libcairo2-dev/unstable \
libxt-dev \
libssl-dev
# Add shiny user
RUN groupadd shiny \
&& useradd --gid shiny --shell /bin/bash --create-home shiny
# Download and install ShinyServer
RUN wget --no-verbose https://download3.rstudio.org/ubuntu-14.04/x86_64/shiny-server-1.5.7.907-amd64.deb && \
gdebi shiny-server-1.5.7.907-amd64.deb
# Install R packages that are required
RUN R -e "install.packages(c('Benchmarking', 'plotly', 'DT'), repos='http://cran.rstudio.com/')"
RUN R -e "install.packages('shiny', repos='https://cloud.r-project.org/')"
# Copy configuration files into the Docker image
COPY shiny-server.conf /etc/shiny-server/shiny-server.conf
COPY /app /srv/shiny-server/
# Make the ShinyApp available at port 80
EXPOSE 80
# Copy further configuration files into the Docker image
COPY shiny-server.sh /usr/bin/shiny-server.sh
CMD ["/usr/bin/shiny-server.sh"]
When I run docker run -p 80:80 myimage, i don't get any error message, however I don't see any app on http://localhost. I even went ahead and added a new rule for network on VM Virtual Box, where the guest and host ports are 80, Host IP = 127.0.0.1, Guest IP = 192.168.99.100, and still app doesn't show up on localhost.
Thanks.