DevContainer PostCreateCommand is not consistent with VSCode

[hinate13]

I'm trying to setup a barebone simple devContainer for use with VSCode on Windows 11 and also GitHub runner. I'm running into what seems like an obvious roadblock to make this happen. I was hoping the GitHub CLI would find the sh file to execute, but it's not searching from the right path. Any help to clarify the failure appreciated!

Here's my .devcontainer/devcontainer.json:

{
    "name": "Test CI/CD Project",
    "build": { 
        "dockerfile": "Dockerfile"
    },
    "features": {
        "ghcr.io/devcontainers/features/git:1": {
            "version": "latest"
        }
    },
    "postCreateCommand": "chmod +x scripts/*.sh && scripts/post-create.sh",
    "postStartCommand": "chmod +x scripts/*.sh && scripts/post-start.sh",
    "customizations": {
        "vscode": {
            "extensions": [
                "ms-azuretools.vscode-docker"
            ],
            "settings": {
                "terminal.integrated.defaultProfile.linux": "bash"
            }
        }
    },
    "remoteUser": "root",
    "forwardPorts": []
}

Here's .devContainer/scripts/post-create.sh:

#!/bin/bash

# This script runs after the container is created
echo 'Post-create script running (/.devcontainer/scripts)...'
echo "Current folder: $(pwd)"
echo "Current user: $(whoami)"

I also added /scripts/post-create.sh (note the difference in first echo showing identifying which script runs):

#!/bin/bash

# This script runs after the container is created
echo 'Post-create script running from (/workspace/scripts)...'
echo "Current folder: $(pwd)"
echo "Current user: $(whoami)"

Expectation: This build works in VSCode, and it prints

'Post-create script running (/.devcontainer/scripts)...'

However, when run from github runner, it will show:

Post-create script running from (/workspace/scripts)

See logs logs.txt

Here's my github workflow:

name: Test CI/CD with DevContainer Builder

on:
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]

jobs:
  test-custom-builder:
    runs-on: ubuntu-latest
    
    # Add permissions for pushing to GitHub Container Registry
    permissions:
      contents: read
      packages: write
    
    steps:    
    - name: Checkout code
      uses: actions/checkout@v3

    # Add authentication step for GitHub Container Registry
    - name: Log in to GitHub Container Registry
      uses: docker/login-action@v2
      with:
        registry: ghcr.io
        username: ${{ github.actor }}
        password: ${{ secrets.GITHUB_TOKEN }}

    - name: Pre-build dev container image
      uses: devcontainers/[email protected]
      with:
        imageName: ghcr.io/${{ github.repository }}/devcontainer
        # cacheFrom: ghcr.io/${{ github.repository }}/devcontainer
        # push: always    

    - name: Run make ci-build in dev container
      uses: devcontainers/[email protected]
      with:    
        push: never
        runCmd: python3 special_add.py
    # ...existing code...