Update Dockerfile

Dockerfile

@@ -2,13 +2,58 @@ FROM rocker/r-base:latest
 
 WORKDIR /code
 
-RUN install2.r --error \
-    shiny \
-    dplyr \
-    ggplot2 \
-    readr \
-    ggExtra
-    
+# ----------------------------
+# System dependencies
+# - curl/ssl/xml: for httr + general installs
+# - fonts/rendering: for gt / text rendering
+# - image libs: for png/jpeg support
+# - build tooling: needed to compile some R packages
+# - Arrow deps: needed for the arrow R package (read_parquet)
+# ----------------------------
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    ca-certificates \
+    curl \
+    wget \
+    git \
+    make \
+    g++ \
+    pkg-config \
+    cmake \
+    libcurl4-openssl-dev \
+    libssl-dev \
+    libxml2-dev \
+    libfontconfig1-dev \
+    libfreetype6-dev \
+    libpng-dev \
+    libjpeg-dev \
+    libtiff5-dev \
+    libharfbuzz-dev \
+    libfribidi-dev \
+    zlib1g-dev \
+    libbz2-dev \
+    liblz4-dev \
+    libzstd-dev \
+    libsnappy-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# ----------------------------
+# R package installs
+# Use CRAN; set Ncpus for speed
+# ----------------------------
+RUN R -e "options(repos=c(CRAN='https://cloud.r-project.org')); \
+          install.packages(c( \
+            'shiny','shinydashboard','shinyWidgets', \
+            'dplyr','tidyr','purrr', \
+            'ggplot2','ggExtra','scales', \
+            'gt','png', \
+            'readr','httr','arrow' \
+          ), Ncpus=parallel::detectCores());"
+
+# Copy app
 COPY . .
 
-CMD ["R", "--quiet", "-e", "shiny::runApp(host='0.0.0.0', port=7860)"]
+# Expose HF default port (optional but nice)
+EXPOSE 7860
+
+# Run app
+CMD ["R", "--quiet", "-e", "shiny::runApp(host='0.0.0.0', port=7860)"]