Add .devcontainer setup

.devcontainer/Dockerfile

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+# See here for image contents: https://github.com/microsoft/vscode-dev-containers/tree/v0.155.1/containers/java/.devcontainer/base.Dockerfile
+
+# [Choice] Java version: 11, 15
+ARG VARIANT="11"
+FROM mcr.microsoft.com/vscode/devcontainers/java:0-${VARIANT}
+
+# Install Maven
+ARG INSTALL_MAVEN="true"
+ARG MAVEN_VERSION=""
+
+# Install apt-add-repository
+RUN apt-get update && apt-get install -y software-properties-common && \
+    apt-get clean -y && rm -rf /var/lib/apt/lists/*
+
+# Install Terraform
+RUN curl -fsSL https://apt.releases.hashicorp.com/gpg | (OUT=$(apt-key add - 2>&1) || echo $OUT) && \
+    apt-add-repository "deb [arch=amd64] https://apt.releases.hashicorp.com $(lsb_release -cs) main" && \
+    apt-get update && export DEBIAN_FRONTEND=noninteractive && apt-get install -y terraform && terraform -install-autocomplete && \
+    apt-get clean -y && rm -rf /var/lib/apt/lists/*
+
+# [Option] Install Node.js
+ARG INSTALL_NODE="false"
+ARG NODE_VERSION="lts/*"
+RUN if [ "${INSTALL_NODE}" = "true" ]; then su vscode -c "umask 0002 && . /usr/local/share/nvm/nvm.sh && nvm install ${NODE_VERSION} 2>&1"; fi
+
+# [Option] Install Azure CLI
+ARG INSTALL_AZURE_CLI="false"
+COPY library-scripts/azcli-debian.sh /tmp/library-scripts/
+RUN if [ "$INSTALL_AZURE_CLI" = "true" ]; then bash /tmp/library-scripts/azcli-debian.sh; fi \
+    && apt-get clean -y && rm -rf /var/lib/apt/lists/* /tmp/library-scripts
+
+# [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 this line to install global node packages.
+# RUN su vscode -c "source /usr/local/share/nvm/nvm.sh && npm install -g <your-package-here>" 2>&1

.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/v0.155.1/containers/java
+{
+	"name": "Java w/ Terraform",
+	"build": {
+		"dockerfile": "Dockerfile",
+		"args": {
+			// Options
+			"INSTALL_NODE": "false",
+			"NODE_VERSION": "lts/*",
+			"INSTALL_AZURE_CLI": "true"
+		}
+	},
+
+	// Set *default* container specific settings.json values on container create.
+	"settings": { 
+		"terminal.integrated.shell.linux": "/bin/bash",
+		"java.home": "/docker-java-home"
+	},
+
+	// Add the IDs of extensions you want installed when the container is created.
+	"extensions": [
+		"vscjava.vscode-java-pack"
+	],
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	"forwardPorts": [8080],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	// "postCreateCommand": "java -version",
+
+	// Comment out connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
+	"remoteUser": "vscode"
+}

.devcontainer/library-scripts/azcli-debian.sh

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+#!/usr/bin/env bash
+#-------------------------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
+#-------------------------------------------------------------------------------------------------------------
+#
+# Docs: https://github.com/microsoft/vscode-dev-containers/blob/master/script-library/docs/azcli.md
+#
+# Syntax: ./azcli-debian.sh
+
+set -e
+
+if [ "$(id -u)" -ne 0 ]; then
+    echo -e 'Script must be run as root. Use sudo, su, or add "USER root" to your Dockerfile before running this script.'
+    exit 1
+fi
+
+export DEBIAN_FRONTEND=noninteractive
+
+# Install curl, apt-transport-https, lsb-release, or gpg if missing
+if ! dpkg -s apt-transport-https curl ca-certificates lsb-release > /dev/null 2>&1 || ! type gpg > /dev/null 2>&1; then
+    if [ ! -d "/var/lib/apt/lists" ] || [ "$(ls /var/lib/apt/lists/ | wc -l)" = "0" ]; then
+        apt-get update
+    fi
+    apt-get -y install --no-install-recommends apt-transport-https curl ca-certificates lsb-release gnupg2 
+fi
+
+# Install the Azure CLI
+echo "deb [arch=amd64] https://packages.microsoft.com/repos/azure-cli/ $(lsb_release -cs) main" > /etc/apt/sources.list.d/azure-cli.list
+curl -sL https://packages.microsoft.com/keys/microsoft.asc | (OUT=$(apt-key add - 2>&1) || echo $OUT)
+apt-get update
+apt-get install -y azure-cli
+echo "Done!"