Can't use fdb.bash instead of create_cluster_file.bash

start.bash of Go and Python official samples calls create_cluster_file.bash (renamed to fdb.bash) in the client (app) server.

https://github.com/apple/foundationdb/blob/master/packaging/docker/samples/golang/app/start.bash

But fdb.bash uses unnecessary fdbserver command which isn't installed and isn't used in create_cluster_file.bash:

https://github.com/apple/foundationdb/blob/124e7eb4f251903b90d5b8addc8742bcafc9e5ae/packaging/docker/fdb.bash#L66

So we can't use fdb.bash instead of create_cluster_file.bash.

```console
/fdb.bash: line 66: fdbserver: command not found
```

How can we resolve this error? And how can we update the official samples?

Start with packaging/docker/fdb.bash, especially the command at line 66, and compare it with packaging/docker/samples/golang/app/start.bash and the corresponding Python sample entry point. Run the official samples to reproduce the fdbserver command-not-found error. Done means both Go and Python samples use the available client tooling successfully without that error.

Written by the indexing model from the issue text.