Revert "#6358 Fix docker language warnings. (#6434)"

This reverts commit 67ade3d.

docker/base/Dockerfile

@@ -20,11 +20,13 @@ RUN useradd beakerx --create-home
 ENV CONDA_DIR /opt/conda
 ENV PATH /opt/conda/bin:$PATH
 ENV NB_USER beakerx
-ENV DEBIAN_FRONTEND noninteractive
+ENV LC_ALL en_US.UTF-8
+ENV LANG en_US.UTF-8
+ENV LANGUAGE en_US.UTF-8
 
-RUN apt-get update && \
-	apt-get install -y --no-install-recommends apt-utils sudo curl unzip software-properties-common apt-transport-https git bzip2 wget && \
-	apt-get dist-upgrade -y && \
+RUN apt-get update && apt-get dist-upgrade -y && \
+	apt-get install -y sudo curl unzip software-properties-common apt-transport-https git bzip2 wget locales && \
+    locale-gen en_US.UTF-8 && \
     echo 'export PATH=/opt/conda/bin:$PATH' > /etc/profile.d/conda.sh && \
     wget --quiet https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O ~/miniconda.sh && \
     /bin/bash ~/miniconda.sh -b -p /opt/conda && \

docker/setup.sh

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-conda create -y -n beakerx 'python>=3' pandas openjdk maven
+conda create -y -n beakerx 'python>=3' nodejs pandas openjdk maven
 source activate beakerx
 conda install -y -c conda-forge ipywidgets