Create Dockerfile

.devcontainer/test-custom-devcontainer/Dockerfile

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+# See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.177.0/containers/javascript-node/.devcontainer/base.Dockerfile
+
+# [Choice] Node.js version: 16, 14, 12
+ARG VARIANT="16-buster"
+FROM mcr.microsoft.com/vscode/devcontainers/javascript-node:0-${VARIANT}
+
+# [Optional] Uncomment this section to install additional OS packages.
+# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+#     && apt-get -y install --no-install-recommends <your-package-list-here>
+
+# [Optional] Uncomment if you want to install an additional version of node using nvm
+# ARG EXTRA_NODE_VERSION=10
+# RUN su node -c "source /usr/local/share/nvm/nvm.sh && nvm install ${EXTRA_NODE_VERSION}"
+
+# [Optional] Uncomment if you want to install more global node modules
+# RUN su node -c "npm install -g <your-package-list-here>"
+
+# Install the GitHub CLI see:
+# https://github.com/microsoft/vscode-dev-containers/blob/3d59f9fe37edb68f78874620f33dac5a62ef2b93/script-library/docs/github.md
+COPY library-scripts/github-debian.sh /tmp/library-scripts/
+RUN apt-get update && bash /tmp/library-scripts/github-debian.sh