Update Dockerfile

Dockerfile

@@ -1,4 +1,4 @@
-FROM rocker/r-base:latest
+FROM rocker/r-ver:4.4.1
 
 RUN apt-get update && apt-get install -y \
     libssl-dev \
@@ -8,7 +8,11 @@ RUN apt-get update && apt-get install -y \
 
 WORKDIR /code
 
-RUN install2.r --error \
+# Belt-and-suspenders for arrow: prefer prebuilt libarrow, never compile
+ENV LIBARROW_BINARY=true \
+    NOT_CRAN=true
+
+RUN install2.r --error --skipinstalled --ncpus -1 \
     bslib \
     shiny \
     dplyr \
@@ -16,9 +20,9 @@ RUN install2.r --error \
     readr \
     ggExtra \
     httr \
-    utils \
     arrow
-    
+
 COPY . .
 
+EXPOSE 7860
 CMD ["R", "--quiet", "-e", "shiny::runApp(host='0.0.0.0', port=7860)"]