create pins url cache folders and update permissions

Dockerfile

@@ -20,6 +20,8 @@ RUN apt-get update -qq && apt-get install -y --no-install-recommends \
 COPY vetiver_renv.lock renv.lock
 # Create the .cache directory and give appuser permission to write to it
 RUN mkdir -p /home/appuser/.cache && chown -R appuser:appuser /home/appuser/.cache
+# Create the .cache/pins/url directory and give appuser permission to write to it
+RUN mkdir -p /home/appuser/.cache/pins/url && chown -R appuser:appuser /home/appuser/.cache/pins/url
 
 RUN Rscript -e "install.packages('renv')"
 RUN Rscript -e "renv::restore()"