Generated template.yml references incorrect CodeUri

[corey-cole]

The initial template.yml generated at the root of the project has CodeUri: build/. Executing sam build results in a no-op obscured by a stack trace:

Skipping copy operation since source <my working directory>/alb-perimeter-hook/build does not exist

Error: [Errno 2] No such file or directory: '<my working directory>/alb-perimeter-hook/.aws-sam/build/TypeFunction'
Traceback:
  File "/opt/homebrew/Cellar/aws-sam-cli/1.101.0/libexec/lib/python3.12/site-packages/click/core.py", line 1078, in main
    rv = self.invoke(ctx)
         ^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/aws-sam-cli/1.101.0/libexec/lib/python3.12/site-packages/click/core.py", line 1688, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/aws-sam-cli/1.101.0/libexec/lib/python3.12/site-packages/click/core.py", line 1434, in invoke
    return ctx.invoke(self.callback, **ctx.params)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/aws-sam-cli/1.101.0/libexec/lib/python3.12/site-packages/click/core.py", line 783, in invoke
    return __callback(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/aws-sam-cli/1.101.0/libexec/lib/python3.12/site-packages/samcli/cli/cli_config_file.py", line 347, in wrapper
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/aws-sam-cli/1.101.0/libexec/lib/python3.12/site-packages/click/decorators.py", line 92, in new_func
    return ctx.invoke(f, obj, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/aws-sam-cli/1.101.0/libexec/lib/python3.12/site-packages/click/core.py", line 783, in invoke
    return __callback(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/aws-sam-cli/1.101.0/libexec/lib/python3.12/site-packages/samcli/lib/telemetry/metric.py", line 184, in wrapped
    raise exception  # pylint: disable=raising-bad-type
    ^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/aws-sam-cli/1.101.0/libexec/lib/python3.12/site-packages/samcli/lib/telemetry/metric.py", line 149, in wrapped
    return_value = func(*args, **kwargs)
                   ^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/aws-sam-cli/1.101.0/libexec/lib/python3.12/site-packages/samcli/lib/utils/version_checker.py", line 42, in wrapped
    actual_result = func(*args, **kwargs)
                    ^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/aws-sam-cli/1.101.0/libexec/lib/python3.12/site-packages/samcli/cli/main.py", line 95, in wrapper
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/aws-sam-cli/1.101.0/libexec/lib/python3.12/site-packages/samcli/commands/build/command.py", line 171, in cli
    do_cli(
  File "/opt/homebrew/Cellar/aws-sam-cli/1.101.0/libexec/lib/python3.12/site-packages/samcli/commands/build/command.py", line 260, in do_cli
    ctx.run()
  File "/opt/homebrew/Cellar/aws-sam-cli/1.101.0/libexec/lib/python3.12/site-packages/samcli/commands/build/build_context.py", line 281, in run
    self._build_result = builder.build()
                         ^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/aws-sam-cli/1.101.0/libexec/lib/python3.12/site-packages/samcli/lib/build/app_builder.py", line 218, in build
    return ApplicationBuildResult(build_graph, build_strategy.build())
                                               ^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/aws-sam-cli/1.101.0/libexec/lib/python3.12/site-packages/samcli/lib/build/build_strategy.py", line 81, in build
    result.update(self._build_functions(self._build_graph))
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/aws-sam-cli/1.101.0/libexec/lib/python3.12/site-packages/samcli/lib/build/build_strategy.py", line 91, in _build_functions
    function_build_results.update(self.build_single_function_definition(build_definition))
                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/homebrew/Cellar/aws-sam-cli/1.101.0/libexec/lib/python3.12/site-packages/samcli/lib/build/build_strategy.py", line 195, in build_single_function_definition
    osutils.copytree(single_build_dir, artifacts_dir)
  File "/opt/homebrew/Cellar/aws-sam-cli/1.101.0/libexec/lib/python3.12/site-packages/samcli/lib/utils/osutils.py", line 164, in copytree
    names = os.listdir(source)
            ^^^^^^^^^^^^^^^^^^

Updating the generated template to CodeUri: src/ results in a working build result with no stack trace. The documentation doesn't explain how a build directory is/might be created, and none of the steps executed in the initial README result in a build directory.