repo main branch mentioned on article doesn't contain the structure described on the documentation

```
- [ ] bug report -> please search issues before submitting
- [ ] feature request
- [x] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)
```

### Minimal steps to reproduce
>Do what the doco says, clone the repo and install the npm packages

>Step 1
`git clone https://github.com/Azure-Samples/ms-identity-javascript-angular-tutorial.git`

>Step 2
```
cd 1-Authentication\1-sign-in-angular\SPA
npm install
```
>The folder structure is not there.

### Any log messages given by the failure
N/A

### Expected/desired behavior
>The folder structure should be there and the user should be able to continue with the steps on the tutorial.

>Comments:
>I saw that other branches have indeed that and other folders, but not the main branch, and therefore, I'm unable to figure out which one I should use.

### OS and Version?
> Windows 7, 8 or 10. Linux (which distribution). macOS (Yosemite? El Capitan? Sierra?)

### Versions
> N/A

### Mention any other details that might be useful

When following the steps described in https://github.com/Azure-Samples/ms-identity-ciam-javascript-tutorial/blob/main/1-Authentication/2-sign-in-angular/README.md#step-1-clone-or-download-this-repository

The repo's https://github.com/Azure-Samples/ms-identity-javascript-angular-tutorial.git main branch (no branch is mentioned, so I'm assuming main) doesn't have the structure described, therefore, the user can't continue with the tutorial after cloning it from git.