Fix build error for the rstudio image (#10)

* replace devtools with remotes to fix build error * fix line continuation typo
getpopper · Oct 9, 2020 · 3e8e847 · 3e8e847
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diff --git a/r/README.md b/r/README.md
@@ -1,7 +1,7 @@
 # rstudio
 
 Images for using R with Popper. Each folder contains `Dockerfile` based on the 
-Rocker image of the same name
+[Rocker](https://www.rocker-project.org/) image of the same name
 
 
 ## License

diff --git a/r/rstudio/Dockerfile b/r/rstudio/Dockerfile
@@ -5,12 +5,12 @@ LABEL description="Used as a base for Popper workflows using R, rstudio and the
 # labels match the corresponding Rocker image
 LABEL version="4.0.0" 
 
-
 # move configuration file where rstudio server will find it
 COPY rsession.conf /etc/rstudio 
 
 # install containerit
-RUN R -e "devtools::install_github(\"o2r-project/containerit\")"
+RUN R -e "install.packages(\"remotes\")" && \
+    R -e "remotes::install_github(\"o2r-project/containerit\")"
 
 EXPOSE 8787
 CMD ["bin/sh"]