Remove macOS and Apple container references

- Remove Containerfile and .containerignore (Apple container specific)
- Update package.json to remove Apple container scripts
- Replace macOS-specific build scripts with Docker-focused versions
- Update README to prioritize Docker over Apple container
- Update DEVELOPMENT.md to remove macOS-first approach
- Update demo script to remove Apple container references
- Update workflow to remove Containerfile path triggers
- Simplify project to be Docker-first for cross-platform compatibility

.github/copilot-instructions.md

@@ -24,9 +24,3 @@ Framework to be used:
 ## Containerization
 
 The application should be prepared for deployment using containerization. It should extend minimal Node 24 LTS container image.
-
-Do not assume the Docker is installed on the development machine.
-
-The development machine is a MacOS system with Apple `container` command from @github/apple/container.
-
-Build scripts should target MacOS with the above toolset as first class environment. Docker should be used only as secondary option.

.github/workflows/build-container.yml

@@ -8,7 +8,6 @@ on:
       - 'public/**'
       - 'package*.json'
       - 'Dockerfile'
-      - 'Containerfile'
   pull_request:
     branches: [ main ]
     paths:
@@ -16,7 +15,6 @@ on:
       - 'public/**'
       - 'package*.json'
       - 'Dockerfile'
-      - 'Containerfile'
 
 env:
   IMAGE_NAME: jmespath-playground