Update Dockerfile

add catboost for linux

Dockerfile

@@ -11,6 +11,11 @@ RUN install2.r --error \
     ggplot2 \
     shiny
 
+RUN install2.r --error \
+    devtools
+
+RUN R -e "devtools::install_url(' https://github.com/catboost/catboost/releases/download/v1.2/catboost-R-Linux-1.2.tgz', INSTALL_opts = c("--no-multiarch", "--no-test-load"))"
+
 # Install development packages from GitHub
 RUN installGithub.r \
     rstudio/bslib \