Fix devcontainer issues for local and Codespaces run

[jamesmcroft]

Purpose

To resolve #35

This pull request includes several changes to the dev container setup, script configurations, and documentation to improve the development environment and user experience. The most important changes are grouped into three themes: dev container configuration, script updates, and documentation enhancements.

Dev Container Configuration:

• Updated the Docker image reference in .devcontainer/devcontainer.json to use the vscode namespace.
• Added remoteUser, containerUser, and port forwarding settings to .devcontainer/devcontainer.json.

Script Updates:

• Modified .devcontainer/local-features/dev-tools/install.sh to set the USERNAME variable. [1] [2]
• Added a check to create the .env file if it does not exist in Setup-Environment.ps1.

Documentation Enhancements:

• Updated the README.md to include new sections for setting up the environment on GitHub Codespaces and locally, and added instructions for deploying the Azure environment. [1] [2] [3] [4]

These changes aim to streamline the development process and provide clearer guidance for setting up and using the development environment.

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[x] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

Other Information

Copilot reviewed 2 out of 6 changed files in this pull request and generated no comments.

Files not reviewed (4)

• .devcontainer/devcontainer.json: Language not supported
• .devcontainer/local-features/dev-tools/install.sh: Language not supported
• .gitattributes: Language not supported
• Setup-Environment.ps1: Language not supported

Comments suppressed due to low confidence (4)

README.md:55

• The syntax [!IMPORTANT] is not standard Markdown and may not render correctly. Consider using a standard Markdown blockquote or heading for important notes.

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README.md:76

• The syntax [!NOTE] is not standard Markdown and may not render correctly. Consider using a standard Markdown blockquote or heading for notes.

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README.md:89

• The syntax [!NOTE] is not standard Markdown and may not render correctly. Consider using a standard Markdown blockquote or heading for notes.

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README.md:98

• The syntax [!NOTE] is not standard Markdown and may not render correctly. Consider using a standard Markdown blockquote or heading for notes.

> [!NOTE]