Added vscode's .devcontainer

.devcontainer/Dockerfile

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+# from: https://github.com/microsoft/vscode-dev-containers/blob/14b53bf68f467dc6fe1a1a378ba10b9db9e6d318/containers/dotnet/.devcontainer/Dockerfile
+# and: https://github.com/microsoft/vscode-dev-containers/blob/main/containers/powershell/.devcontainer/Dockerfile
+
+ARG DOTNET_VARIANT=6.0-bullseye
+FROM mcr.microsoft.com/vscode/devcontainers/dotnet:0-${DOTNET_VARIANT}
+
+ARG INSTALL_ZSH="true"
+ARG UPGRADE_PACKAGES="true"
+
+# Install needed packages and setup non-root user. Use a separate RUN statement to add your own dependencies.
+ARG USERNAME=vscode
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+COPY library-scripts/*.sh /tmp/library-scripts/
+RUN apt-get update \
+    && /bin/bash /tmp/library-scripts/common-debian.sh "${INSTALL_ZSH}" "${USERNAME}" "${USER_UID}" "${USER_GID}" "${UPGRADE_PACKAGES}" "true" "true" \
+    && chsh "${USERNAME}" -s "$(which pwsh)" \
+    && apt-get autoremove -y && apt-get clean -y && rm -rf /var/lib/apt/lists/* /tmp/library-scripts
+
+# Download the latest stable `nuget.exe` to `/usr/local/bin`
+RUN curl -o /usr/local/bin/nuget.exe https://dist.nuget.org/win-x86-commandline/latest/nuget.exe
+RUN chmod +x /usr/local/bin/nuget.exe
+
+
+# [Optional] Uncomment this section to install additional packages.
+# RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+#     && apt-get -y install --no-install-recommends <your-package-list-here>

.devcontainer/devcontainer.json

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+{
+    "name": "AtlassianPS Dev Environment",
+    "dockerFile": "Dockerfile",
+    "customizations": {
+        "vscode": {
+            "settings": {
+                "terminal.integrated.defaultProfile.linux": "pwsh"
+            },
+            "extensions": [
+                "DavidAnson.vscode-markdownlint",
+                "editorconfig.editorconfig",
+                "formulahendry.code-runner",
+                // "github.codespaces",
+                // "github.vscode-github-actions",
+                // "github.vscode-pull-request-github",
+                "ms-vscode.PowerShell",
+                "jasonnutter.vscode-codeowners",
+                "streetsidesoftware.code-spell-checker",
+                "pspester.pester-test"
+                // "davidanson.vscode-markdownlint",
+                // "github.copilot",
+                // "eamodio.gitlens",
+            ]
+        }
+    },
+    "remoteUser": "vscode"
+}