[HELP]: No dist/program/helloworld.so file in build a hello world smart contract project

### Project: learn how to set up solana by building a hello world smart contract
### Lesson Number: 29

### Question: It says to run solana progam deploy dist/program/helloworld.so but there isn't even a dist directory anywhere.

### Code and Screenshots

Start with Lesson 29 and trace the build steps preceding the `solana progam deploy dist/program/helloworld.so` command. Verify whether those steps create the expected `dist` directory and file; done means the lesson either produces that artifact or clearly documents the correct build and deployment command.

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