Update Dockerfile

Dockerfile

@@ -1,16 +1,26 @@
 FROM rocker/r2u:latest
 WORKDIR /code
 
-# System dependencies
-# (no Python: the app fetches private model files over HTTPS via httr, not reticulate/huggingface_hub)
+# System dependencies + Python (needed by reticulate for the Hugging Face
+# upload step in the Scraping tab)
 RUN apt-get update && apt-get install -y --no-install-recommends \
     ca-certificates \
     libcurl4-openssl-dev \
     libssl-dev \
     libxml2-dev \
     libmagick++-dev \
+    python3 \
+    python3-pip \
+    python3-dev \
+    libpython3-dev \
     && rm -rf /var/lib/apt/lists/*
 
+# huggingface_hub for the dataset upload feature
+RUN pip3 install huggingface_hub --break-system-packages
+
+# Tell reticulate which Python to use
+ENV RETICULATE_PYTHON=/usr/bin/python3
+
 # Heavy R packages (cached separately so they don't rebuild often)
 RUN install2.r --error --skipinstalled \
     arrow \
@@ -23,16 +33,20 @@ RUN install2.r --error --skipinstalled \
 # Lighter R packages (this layer rebuilds if you add/remove packages)
 RUN install2.r --error --skipinstalled \
     shiny \
+    shinyBS \
+    DT \
     dplyr \
     ggplot2 \
     gridExtra \
     stringr \
+    readr \
     zip \
     png \
     jsonlite \
     httr \
     ggforce \
-    magick
+    magick \
+    reticulate
 
 # Copy app files (changes here won't trigger package reinstall)
 COPY . .