Update Dockerfile

Dockerfile

@@ -5,7 +5,7 @@ FROM rocker/geospatial:latest
 WORKDIR /code
 
 # Install required R packages, excluding suggested dependencies to avoid rnaturalearthhires error
-RUN Rscript -e "install.packages(c('shiny', 'shinydashboard', 'dplyr', 'readr', 'sf', 'cartogram', 'ggplot2', 'rnaturalearth', 'rnaturalearthdata', 'countrycode', 'DT', 'ggExtra', 'viridis','ggiraph','extrafont'), dependencies = c('Depends', 'Imports', 'LinkingTo'), repos = 'https://cran.r-project.org')"
+RUN Rscript -e "install.packages(c('shiny', 'shinydashboard', 'dplyr', 'readr', 'sf', 'cartogram', 'ggplot2', 'rnaturalearth', 'rnaturalearthdata', 'countrycode', 'DT', 'ggExtra', 'viridis','ggiraph','extrafont'), dependencies = c('Depends', 'Imports', 'LinkingTo','leaflet'), repos = 'https://cran.r-project.org')"
 
 # Copy the current directory (containing app.R and data) into the container
 COPY . .