print R capabilities

Dockerfile

@@ -44,7 +44,7 @@ ARG R_VERSION=latest
 # Install R, along with its dependencies
 RUN /opt/scripts/install_r_cran.sh
 # Test R in another layer
-RUN R -q -e "sessionInfo()"
+RUN R -q -e "sessionInfo(); capabilities()"
 
 # Copy the remaining scripts
 COPY ./scripts /opt/scripts