update devcontainer to build from dockerfile

Author: ben-schwen

.devcontainer/r-devel-growable/Dockerfile

@@ -1,46 +1,4 @@
-FROM registry.gitlab.com/rdatatable/dockerfiles/r-devel-gcc
-
-RUN apt-get -qq update \
-  && apt-get install -y --no-install-recommends \
-    git \
-    patch \
-    subversion \
-    rsync \
-    texinfo \
-    texlive-latex-base \
-    texlive-latex-recommended \
-    texlive-fonts-recommended \
-  && rm -rf /var/lib/apt/lists/*
-
-COPY .devcontainer/r-devel-growable/growable-api.patch /opt/growable-api.patch
-
-WORKDIR /opt/R-source
-RUN svn checkout https://svn.r-project.org/R/trunk R-devel && \
-    cd R-devel && \
-    patch -p0 < /opt/growable-api.patch
-
-# Build patched R
-WORKDIR /opt/R-source/R-devel
-RUN ./configure \
-    --prefix=/usr/local \
-    --enable-R-shlib \
-    --enable-memory-profiling \
-    --with-blas \
-    --with-lapack \
-    --with-readline \
-    --with-cairo \
-    --with-libpng \
-    --with-jpeglib \
-    --with-libtiff \
-    --disable-nls && \
-    make -j$(nproc) && \
-    make install
-
-RUN echo 'Testing growable vectors...' && \
-    /usr/local/bin/R --slave -e '.Internal(growvec_alloc(13L, 0, 10))'
-
-ENV PATH=/usr/local/bin:$PATH
-ENV R_HOME=/usr/local/lib/R
+FROM registry.gitlab.com/rdatatable/dockerfiles/r-devel-growable
 
 COPY DESCRIPTION .
 RUN /usr/local/bin/Rscript -e '                               \