Dockerfile.single-stage

# ============================================================================
# SINGLE-STAGE DOCKERFILE (BEFORE OPTIMIZATION)
# ============================================================================
# This approach has several inefficiencies:
# 1. Build tools remain in final image (bloat)
# 2. Poor layer caching - any code change invalidates package installations
# 3. Longer build times due to redundant dependency resolution
# 4. Larger final image size (~2GB+)
# ============================================================================

FROM rocker/r2u:24.04

# Configure renv cache to be inside the app directory
ENV RENV_PATHS_CACHE="/app/renv/.cache"

# Install system dependencies
RUN apt-get update && apt-get install -y \
    libcurl4-openssl-dev \
    libssl-dev \
    libxml2-dev \
    libfontconfig1-dev \
    libharfbuzz-dev \
    libfribidi-dev \
    libfreetype6-dev \
    libpng-dev \
    libtiff5-dev \
    libjpeg-dev \
    pandoc \
    && rm -rf /var/lib/apt/lists/*

# Set working directory
WORKDIR /app

# Copy everything at once (poor caching)
COPY . .

# Install R packages
RUN R -e "install.packages('renv', repos = 'https://cloud.r-project.org')"
RUN R -e "renv::restore()"

# Expose port
EXPOSE 3838

# Run the application
# Note: Use --vanilla to skip .Rprofile and avoid renv activation at runtime
# The renv library path is already in R's search path
CMD ["R", "--vanilla", "-e", ".libPaths('/app/renv/library/linux-ubuntu-noble/R-4.5/x86_64-pc-linux-gnu'); shiny::runApp('/app', host = '0.0.0.0', port = 3838)"]