Update Dockerfile

Dockerfile

@@ -1,14 +1,49 @@
 FROM rocker/r-base:latest
 
-WORKDIR /code
+RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+    libcurl4-openssl-dev \
+    libssl-dev \
+    libxml2-dev \
+    libfontconfig1-dev \
+    libfreetype6-dev \
+    libxrender1 \
+    libxext6 \
+    libnss3 \
+    libasound2 \
+    libatk-bridge2.0-0 \
+    libgtk-3-0 \
+    libdrm2 \
+    libgbm1 \
+    fonts-liberation \
+    chromium \
+    ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
 
-RUN install2.r --error \
+# Let chromote/webshot2 find Chromium
+ENV CHROME_BIN=/usr/bin/chromium
+ENV CHROMOTE_CHROME=/usr/bin/chromium
+
+# Create app dir
+WORKDIR /app
+
+# Install R packages (keep this separate so it layers/caches nicely)
+# Add anything else you need here
+RUN install2.r --error --skipinstalled \
     shiny \
+    shinydashboard \
+    DT \
     dplyr \
-    ggplot2 \
+    shinyjs \
     readr \
-    ggExtra
-    
-COPY . .
+    webshot2 \
+    htmlwidgets \
+    ggplot2
+
+
+COPY . /app
+
+EXPOSE 7860
 
-CMD ["R", "--quiet", "-e", "shiny::runApp(host='0.0.0.0', port=7860)"]
+# Run the Shiny app
+# This respects PORT if provided by the host, defaulting to 7860.
+CMD ["R", "--quiet", "-e", "options(shiny.port=as.integer(Sys.getenv('PORT', 7860)), shiny.host='0.0.0.0'); shiny::runApp('/app')"]