## Summary
- Fixed the directory structure and commands for the second scenario
#6833
- Added a headline "Migrating an existing FastAPI project" because the
first part looks like a migration scenario, but didn't have its own
section before.
- Added explicit `--app` flags to commands to emphasize that the
commands create an Application project. Although maybe unnecessary
considering that `--app` is now default.
- Added instructions for testing that the dev server and Docker image
work correctly
- Took the liberty of adding a `project` at the root of all directory
structures and appropriate commands.
- With explicitly defined root directory it is easier to differentiate
between the `project` root directory and FastAPI's `app` directory.
- Without it it could be less obvious for developers less familiar with
FastAPI. Had a similar issue when started using Django several years
ago.
- If I left `app` in the command, then after copying the **app
directory** from https://github.com/astral-sh/uv-fastapi-example the
path would be `app/app/...`.
- Cleaned up glyphs in tree sctructures that were copied from FastAPI
docs.
## Caveats
- On project initialization `hello.py` is created. It is not reflected
in directory structure trees in this PR and may be slightly confusing
for developers less familiar with uv.
- I believe it will be soon addressed in #6750 and after that the docs
will reflect actual directory structure.
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## Summary
Two small typo fixes: one in the documentation and one in a comment in
the source code I happened to come across.
