I believe that this app is perfect for installation as a PWA. It's feature is a must have for me as a software developer, to be available as quickly as possible, from my mobile and desktop device.

Add a single page that invokes the API (api/DefaultNewGuid) and shows the created GUID in a text box with a copy-to-clipboard button.

The page should be as lightweight as possible, without tracking, JS frameworks, etc.

The page can be placed in a folder /content/static-site/.
It sounds like this page should be called index.html.

To host this site, use the Storage Account Static Site Hosting functionality.
This requires a new storage account, enable the static site hosting, and copy the files to the appropriate $web container.

By default, we should deploy to the Test environment. This can be changed in the parameters file.

Deployment to Production (Prod), should only be done manually (by me) at this moment.

Currently runs on v3, but support is ending in December 2023.
Updating to v4 should be easy enough, only the ~3 needs to be replaced with ~4 and everything should work similarly.

Due to the nature of the deployment of an Azure Function and running it from a package there is downtime at the moment.

Deployment of the Bicep file causes the run from package configuration setting to be set to 1, and not the URL where the package is located. This value is updated to the URL when the actual zip-file is uploaded.

Change this to a two-step deployment, similar to what has been done in the Minifier solution where this is also done in two deployment steps (https://github.com/Jandev/minifier/blob/develop/.github/workflows/release.yml).
First upload the zip file, get the correct URL and then use the URL as an input parameter to the Bicep files and set the correct configuration value.

Create a small NPM package that invokes the api/DefaultNewGuid endpoint.
By default, it should return the JSON response, mentioned in #1, but there should be an opt-in for a plain-text response.

The package should be pushed towards the NPM registry whenever changes are made to the 'library'.

There's a button on the static site page right now which is able to copy the created guid to the clipboard.

It would be great if the same functionality can be put in the key combo [Ctrl]+[c] (case insensitive) for easier copying of the guid and not having to bother with clicking the right element in the UI.

From a UX perspective it's great to have this written in some note on the homepage.

The Azure Functions project is running on .NET Core 3.1, which is out of support.

Upgrade to the latest LTS, which is .NET 8.

This will require to change from the inproc to the isolated runtime of Azure Functions.

All Application Insights instances should be changed to log to a Log Analytics Workspace.

This workspace needs to be created within the *-infra resource group.

When the request has an Accept-header for application/json, it should return an object with a new guid, like:

{
  "value": "[the generated guid]"
}

Of course, the returned Content-Type also has to be set correctly.