Permission denied Error with runtimes build by Agentcore SDK

**Describe the bug**

The Docker file generated by running the agentcore configure command has the following -

RUN useradd -m -u 1000 bedrock_agentcore
USER bedrock_agentcore

EXPOSE 9000
EXPOSE 8000
EXPOSE 8080

COPY . .

However when the agent is called , it gives permission denied to run the agent.py file

To Reproduce
Steps to reproduce the behavior:
Execute the agentcore configure command with the required python file and requirement file.

Once the runtime is available , try to test the endpoint ,
4. See error
Cloudwatch logs :

2026-08-26T08:23:00.907Z | Traceback (most recent call last): -- | -- | 2026-08-26T08:23:00.907Z File "", line 189, in _run_module_as_main | File "", line 189, in _run_module_as_main | 2026-08-26T08:23:00.907Z File "", line 159, in _get_module_details | File "", line 159, in _get_module_details | 2026-08-26T08:23:00.907Z File "", line 1073, in get_code | File "", line 1073, in get_code | 2026-08-26T08:23:00.907Z File "", line 1130, in get_data | File "", line 1130, in get_data | 2026-08-26T08:23:00.907ZPermissionError: [Errno 13] Permission denied: '/app/stockanalysisagent.py'
Expected behavior

It should not give permission error

As a work around i have tried to edit the docker file as follows
RUN useradd -m -u 1000 bedrock_agentcore
COPY --chown=bedrock_agentcore:bedrock_agentcore . .
RUN chmod -R u=rwX,go=rX /app

USER bedrock_agentcore

EXPOSE 9000
EXPOSE 8000
EXPOSE 8080

Start with the Dockerfile generated by the `agentcore configure` command and reproduce the runtime using the reported `/app/stockanalysisagent.py` permission error. Compare the generated file with the documented workaround involving ownership and permissions; done means a configured runtime can execute the agent file without a PermissionError.

Written by the indexing model from the issue text.