[UUF] CreateApplicationBuilder is not part of Host

### Type of issue

Code doesn't work

### Description

CreateApplicationBuilder is not part of Host

### Page URL

https://learn.microsoft.com/en-us/dotnet/core/extensions/configuration

### Content source URL

https://github.com/dotnet/docs/blob/main/docs/core/extensions/configuration.md

### Document Version Independent Id

0d5de37c-8f89-b6a5-3132-2c5214196bfd

### Platform Id

212ae417-5e03-de34-9bd9-b3e8724270df

### Article author

@gewarren

### Metadata

* ID: b458a209-339d-e896-4e85-6d1c6a7aa1f9
* PlatformId: 212ae417-5e03-de34-9bd9-b3e8724270df
* Service: **dotnet-fundamentals**

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