Update to latest definition for node

.devcontainer/Dockerfile

@@ -1,37 +1,38 @@
-#-----------------------------------------------------------------------------------------
+#-------------------------------------------------------------------------------------------------------------
 # Copyright (c) Microsoft Corporation. All rights reserved.
-# Licensed under the MIT License. See LICENSE in the project root for license information.
-#-----------------------------------------------------------------------------------------
+# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
+#-------------------------------------------------------------------------------------------------------------
 
 FROM node:10
 
-# Configure apt
+# Avoid warnings by switching to noninteractive
 ENV DEBIAN_FRONTEND=noninteractive
+
+# Configure apt and install packages
 RUN apt-get update \
-   && apt-get -y install --no-install-recommends apt-utils 2>&1
-
-# Verify git and process tools are installed
-RUN apt-get install -y git procps
-
+    && apt-get -y install --no-install-recommends apt-utils 2>&1 \ 
+    #
+    # Verify git and needed tools are installed
+    && apt-get install -y git procps \
+    #
     # Remove outdated yarn from /opt and install via package 
     # so it can be easily updated via apt-get upgrade yarn
-RUN rm -rf /opt/yarn-* \
+    && rm -rf /opt/yarn-* \
     && rm -f /usr/local/bin/yarn \
     && rm -f /usr/local/bin/yarnpkg \
     && apt-get install -y curl apt-transport-https lsb-release \
     && curl -sS https://dl.yarnpkg.com/$(lsb_release -is | tr '[:upper:]' '[:lower:]')/pubkey.gpg | apt-key add - 2>/dev/null \
     && echo "deb https://dl.yarnpkg.com/$(lsb_release -is | tr '[:upper:]' '[:lower:]')/ stable main" | tee /etc/apt/sources.list.d/yarn.list \
     && apt-get update \
-    && apt-get -y install --no-install-recommends yarn
-
-# Install eslint
-RUN npm install -g eslint
-
+    && apt-get -y install --no-install-recommends yarn \
+    #
+    # Install eslint globally
+    && npm install -g eslint \
+    #
     # Clean up
-RUN apt-get autoremove -y \
+    && apt-get autoremove -y \
     && apt-get clean -y \
     && rm -rf /var/lib/apt/lists/*
-ENV DEBIAN_FRONTEND=dialog
 
-# Set the default shell to bash rather than sh
-ENV SHELL /bin/bash
+# Switch back to dialog for any ad-hoc use of apt-get
+ENV DEBIAN_FRONTEND=dialog

.devcontainer/devcontainer.json

@@ -5,5 +5,8 @@
     "extensions": [
         "dbaeumer.vscode-eslint"
     ],
+    "settings": {
+        "terminal.integrated.shell.linux": "/bin/bash"
+    },
     "postCreateCommand": "yarn install"
 }