Update Dockerfile

Dockerfile

@@ -1,17 +1,16 @@
 # Use rocker/geospatial as the base image to include necessary geospatial libraries
 FROM rocker/geospatial:latest
 
-# Set the working directory inside the container
 WORKDIR /code
 
-# Install required R packages, specifying the CRAN repository for reliability.
-# Note: "cartogram" has been removed to avoid the dependency error for rnaturalearthhires.
-RUN install2.r --error --deps TRUE --repos "https://cran.r-project.org" \
+# Install R packages but limit dependencies to required ones (skipping suggested packages like rnaturalearthhires)
+RUN install2.r --error --deps 'Depends,Imports,LinkingTo' --repos "https://cran.r-project.org" \
     shiny \
     shinydashboard \
     dplyr \
     readr \
     sf \
+    cartogram \
     ggplot2 \
     rnaturalearth \
     rnaturalearthdata \
@@ -20,11 +19,11 @@ RUN install2.r --error --deps TRUE --repos "https://cran.r-project.org" \
     ggExtra \
     viridis
 
-# Copy all files from the current directory to the container's working directory
+# Copy the application code into the container
 COPY . .
 
-# Expose port 7860 to allow external access to the Shiny app
+# Expose the port that Shiny will run on
 EXPOSE 7860
 
-# Command to run the Shiny app when the container starts
-CMD ["R", "--quiet", "-e", "shiny::runApp(host='0.0.0.0', port=7860)"]
+# Run the Shiny app
+CMD ["R", "--quiet", "-e", "shiny::runApp(host='0.0.0.0', port=7860)"]