This solution currently requires .NET 8 and 9 SDKs for building as DartSassBuilder requires .NET 8 See the following for .NET SDK installations

The weather feature uses the OpenWeatherMap API. The API key is not committed to source control and must be configured locally before running the app.

1. Sign up for a free account at https://openweathermap.org/
2. After signing in, navigate to API keys under your profile
3. Copy your default key or generate a new one (the free tier supports the Current Weather endpoint used here)

Note: New keys can take up to a few hours to activate.

Create the file EngineAnalyticsWebApp.UI/wwwroot/appsettings.Development.json (already listed in .gitignore — it will never be committed):

{
  "OpenWeatherMap": {
    "ApiKey": "YOUR_API_KEY_HERE"
  }
}

This file is loaded automatically when running in the Development environment (the default for dotnet run / Visual Studio F5). The committed appsettings.json contains an empty placeholder and is safe to commit.

Create the file EngineAnalyticsWebApp.UI/wwwroot/appsettings.Production.json (also gitignored) with the same structure:

{
  "OpenWeatherMap": {
    "ApiKey": "YOUR_API_KEY_HERE"
  }
}

Blazor WASM runs entirely in the browser — Azure App Service "Application Settings" (portal environment variables) are server-side only and are not accessible to the WASM runtime. The appsettings.Production.json file is the correct equivalent: Blazor automatically loads it when the environment is Production (the Azure default), and Visual Studio Publish includes it in the wwwroot output automatically.

Do not use Azure Key Vault or App Service Configuration for this value unless a server-side proxy component is added to the solution.