Update Dockerfile

Dockerfile

@@ -1,17 +1,9 @@
 # ============================================================
-# Dockerfile for HF Spaces (Docker SDK)
-# - Runs a Gradio app (app.py)
-# - Supports Python + R
-# - Runs notebooks via papermill (Python + R kernel)
-# ============================================================
-
 FROM python:3.11-slim
 
-# ---------- System deps ----------
-# - build-essential, gfortran: needed for some R packages (glmnet)
-# - r-base: R runtime
-# - libcurl/ssl/xml2: common deps for R packages
-# - default-jre: sometimes useful for some libs, safe to omit if you want
+# ---- System dependencies ----
+# Key additions vs your previous Dockerfile:
+# - libopenblas-dev, liblapack-dev: required to compile glmnet reliably
 RUN apt-get update && apt-get install -y --no-install-recommends \
     build-essential \
     gfortran \
@@ -20,32 +12,25 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     libcurl4-openssl-dev \
     libssl-dev \
     libxml2-dev \
+    libopenblas-dev \
+    liblapack-dev \
     && rm -rf /var/lib/apt/lists/*
 
-# ---------- R packages ----------
-# Install required R packages for your notebook + prediction:
-# - jsonlite: read/write json
-# - glmnet: lasso logistic regression
-# - Matrix: sparse matrices
-# - pROC: ROC/AUC
-RUN R -e "install.packages(c('jsonlite','glmnet','Matrix','pROC'), repos='https://cloud.r-project.org')"
+# ---- R packages ----
+# Set CRAN mirror explicitly + install packages
+RUN R -e "options(repos=c(CRAN='https://cloud.r-project.org')); install.packages(c('jsonlite','Matrix','pROC','glmnet'), Ncpus=max(1, parallel::detectCores()-1))"
 
-# ---------- IRkernel (so papermill can execute R notebooks) ----------
-RUN R -e "install.packages('IRkernel', repos='https://cloud.r-project.org'); IRkernel::installspec(user = FALSE)"
+# ---- IRkernel (so papermill can run the R notebook kernel 'ir') ----
+RUN R -e "options(repos=c(CRAN='https://cloud.r-project.org')); install.packages('IRkernel'); IRkernel::installspec(user = FALSE)"
 
-# ---------- Python deps ----------
+# ---- Python deps ----
 WORKDIR /app
 COPY requirements.txt /app/requirements.txt
 RUN pip install --no-cache-dir -r /app/requirements.txt
-
-# papermill sometimes needs jupyter + ipykernel explicitly
 RUN pip install --no-cache-dir jupyter ipykernel
 
-# ---------- Copy project files ----------
+# ---- Copy project files ----
 COPY . /app
 
-# HF uses port 7860
 EXPOSE 7860
-
-# ---------- Start Gradio app ----------
 CMD ["python", "app.py"]