Sj add devcontainer3

.devcontainer/Dockerfile

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+ARG VARIANT="12"
+FROM mcr.microsoft.com/vscode/devcontainers/javascript-node:${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>
+
+RUN wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add -
+RUN echo "deb http://dl.google.com/linux/chrome/deb/ stable main" > /etc/apt/sources.list.d/google.list
+RUN apt update
+RUN apt install -y google-chrome-stable xvfb

.devcontainer/devcontainer.json

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+// For format details, see https://aka.ms/devcontainer.json. For config options, see the README at:
+// https://github.com/microsoft/vscode-dev-containers/tree/main/containers/javascript-node
+{
+	"name": "Ubuntu",
+
+	"build": {
+		"dockerfile": "Dockerfile",		
+		"args": { "VARIANT": "12" }
+	},
+
+	"postCreateCommand": "bash .devcontainer/postCreate.sh",
+
+	// Set *default* container specific settings.json values on container create.
+	"settings": {},
+
+
+	// Add the IDs of extensions you want installed when the container is created.
+	"extensions": [
+		"nickdodd79.gulptasks"
+	],
+
+	// 9999 is web server, 9876 is karma
+	"forwardPorts": [9876, 9999],
+
+	// Comment out connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
+	"remoteUser": "node"
+}

.devcontainer/postCreate.sh

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+echo "Post Create Starting"
+
+nvm install
+nvm use
+npm install gulp-cli -g
+npm ci