Docker can't find leaflet when deploying r shiny app - r

Question

I've seen a few other posts about the same issue, but no clear solution from any of them.
When running docker build -t test-shiny ., I get the following error when running the docker image locally:
Error in library(leaflet) : there is no package called ‘leaflet’
Calls: <Anonymous> ... sourceUTF8 -> eval -> eval -> ..stacktraceon.. -> library
Execution halted
Here is my Dockerfile:
# Base image https://hub.docker.com/u/rocker/
FROM rocker/r-base:latest
RUN apt-get update && apt-get -y --no-install-recommends install \
curl \
wget \
sudo \
alien \
redis-server \
gnupg \
unixodbc-dev && \
rm -rf /var/lib/apt/lists/* && \
apt-get clean
RUN apt-get update && apt-get -y --no-install-recommends install \
libpng-dev \
libudunits2-dev \
libgeos-dev \
libproj-dev \
libssl-dev \
libcurl4-openssl-dev \
libhiredis-dev \
libmagick++-dev && \
rm -rf /var/lib/apt/lists/* && \
apt-get clean \
libgdal-dev \
netcdf-bin
# Athena ODBC Drivers
RUN wget https://s3.amazonaws.com/athena-downloads/drivers/ODBC/SimbaAthenaODBC_1.1.9.1001/Linux/simbaathena-1.1.9.1001-1.el7.x86_64.rpm && \
sudo alien -i simbaathena-1.1.9.1001-1.el7.x86_64.rpm && \
rm simbaathena-1.1.9.1001-1.el7.x86_64.rpm
# Dependencies
RUN Rscript -e 'install.packages(c("shiny", "shinydashboard", "ggplot2", "patchwork","dbplyr", "dbplot", "scales", "shinycssloaders", "rJava", "RJDBC", "shinyjs", "shinyBS", "highcharter", "leaflet", "DT", "glue", "DBI", "odbc", "data.table"), dependencies = TRUE, repos="http://cran.rstudio.com/", Ncpus=5)' && rm -rf /tmp/downloaded_packages
# Copy App
RUN mkdir shiny-app
COPY evaluation-app/ /shiny-app
# RShiny Port
EXPOSE 3838
# Run App
CMD ["R", "-e", "shiny::runApp('/shiny-app', host = '0.0.0.0', port = 3838)"]
I know I am installing a lot of r packages, but my app runs fine in RStudio. After reading this post, I already tried adding the solution from the accepted answer, but unsuccessful. Any suggestions or solutions would be much appreciated.