Adding a files field to the spin.toml causes the application to error even if i am not using them.

Reproduce

Create a simple hello world app, create a mydir directory, and add the following files field to the application manifest files = [{ source="mydir", destination="/" }]:

spin new -t http-rust files-bug --accept-defaults
 cd files-bug
mkdir mydir
# add `files = [{ source="mydir", destination="/" }]` to component
spin build --up

When you curl the app you get curl: (52) Empty reply from server with no error logged