Error: unknown command "init" for "flyctl"

When I run the `./configure.sh` command, it returns this error:

```
Error: unknown command "init" for "flyctl"

Did you mean this?
info

Run 'flyctl --help' for usage.
Error unknown command "init" for "flyctl"

Did you mean this?
info
```

I also got these errors:
```
Error: unknown flag: --import
Error unknown flag: --overwrite
```

So it appears that there's some drift between the commands and parameters specified in the bash script and the latest version of `flyctl` that I'm using.

Start with configure.sh and compare its flyctl init invocation and --import/--overwrite flags with the current flyctl --help output. Done means configure.sh completes without unknown-command or unknown-flag errors on the supported flyctl version.

Written by the indexing model from the issue text.