Dockerfile

FROM rocker/r-base:latest

# System deps for R pkgs + headless Chromium (for webshot2 PNG export)
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 \
    libglib2.0-0 \
    libx11-6 \
    libx11-xcb1 \
    libxcb1 \
    libxcomposite1 \
    libxdamage1 \
    libxfixes3 \
    libatk-bridge2.0-0 \
    libgtk-3-0 \
    libdrm2 \
    libgbm1 \
    fonts-liberation \
    fonts-dejavu \
    chromium \
    ca-certificates \
 && rm -rf /var/lib/apt/lists/*

# Let chromote/webshot2 find Chromium and use safe flags in containers
ENV CHROME_BIN=/usr/bin/chromium
ENV CHROMOTE_CHROME=/usr/bin/chromium
ENV CHROMOTE_CHROME_ARGS="--no-sandbox --disable-dev-shm-usage"

WORKDIR /app

# R packages
RUN install2.r --error --skipinstalled \
    shiny \
    shinydashboard \
    DT \
    dplyr \
    shinyjs \
    readr \
    webshot2 \
    htmlwidgets \
    ggplot2

# App code
COPY . /app

EXPOSE 7860

# Run the Shiny app (uses $PORT if provided)
CMD ["R", "--quiet", "-e", "options(shiny.port=as.integer(Sys.getenv('PORT', 7860)), shiny.host='0.0.0.0'); shiny::runApp('/app')"]