How can I make a dockerized Shiny app in a flexdashboard wrapper with golem?

Is it possible to make a shiny app with flexdashboard as a package with the Open Analytics golem package? Is it possible to dockerize it afterwards? How is the workflow going from the flexdashboard .Rmd file?

My Dockerfile so far

FROM rocker/shiny-verse:latest 

MAINTAINER Tim M.Schendzielorz "tim.schendzielorz@googlemail.com"

# Install dependencies 

RUN  echo 'install.packages(c("dplyr","dbplyr","DBI","DT","plotly","flexdashboard","lubridate"), \
        repos="http://cran.us.r-project.org", \
        dependencies=TRUE)'> /tmp/packages.R \
        && Rscript /tmp/packages.R


# Copy configuration files into the Docker image
COPY shiny-server.conf  /usr/bin/shiny-server.conf
COPY shiny-server.sh  /usr/bin/shiny-server.sh

COPY flexdashboard.Rmd /usr/bin/flexdashboard.Rmd   

# make all app files readable (solves issue when dev in Windows, but building in Ubuntu)
RUN chmod -R 755 /usr/bin

# Add shiny user
RUN groupadd  user \
&& useradd --gid user --shell /bin/bash --create-home user

EXPOSE 3838



CMD ["R", "-e rmarkdown::run('/usr/bin/flexdashboard.Rmd')"]

I am new to Docker and it seems I need to add the Command to rmarkdown::run in the apps specs as mentioned here: Deploy Shiny app with Flexdashboard and start the shiny server with the standard shell command instead? Thank you Vincent for docktorrent, will try it now!