# 1) Base off the official Rocker Shiny image
FROM rocker/shiny:4.2.3

USER root

# 2) Install Debian dependencies (including geospatial libs) & clean up
RUN apt-get update -qq \
  && apt-get install -y --no-install-recommends \
       libxml2-dev \
       libcairo2-dev \
       libssh2-1-dev \
       libcurl4-openssl-dev \
       libssl-dev \
       libgeos-dev \
       libproj-dev \
       libgdal-dev \
       libudunits2-dev \
  && rm -rf /var/lib/apt/lists/*

# 3) (Optional) Full system upgrade if you need it
RUN apt-get update -qq \
  && apt-get upgrade -y \
  && rm -rf /var/lib/apt/lists/*

# 4) Install R packages
RUN R -e 'install.packages(c("leaflet","httr","jsonlite"), repos="https://cloud.r-project.org")'

# 5) Expose port and drop privileges
EXPOSE 3838
USER shiny

# 6) Launch Shiny Server
CMD ["shiny-server"]