Initial commit: JMESPath Testing Tool

- React-based web application for testing JMESPath expressions
- macOS-first containerization with Apple container command
- Bootstrap UI with real-time evaluation
- GitHub Actions CI/CD pipeline
- Docker fallback support
- Comprehensive documentation and development scripts

.github/copilot-instructions.md

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+---
+description: Instructions for using the JMESPath Testing Tool repository.
+applyTo: "**/*.md,**/.js"
+---
+# AI Agent Instructions for JMESPath Testing Tool
+
+The tool in this repository is designed to help users validate and test JMESPath expressions against JSON data. It is a React-based web application that provides an interactive interface for entering JMESPath queries and viewing the results.
+
+The application is single page. The page is divided into three sections:
+
+- Top section: Title and description of the tool.
+- Middle section: Input area for JMESPath expressions
+- Bottom left section: Input area for JSON data
+- Bottom right section: Output are for JMESPath query results
+
+The main components of the application are located in the `src` directory and target Node 24 LTS environment.
+
+Framework to be used:
+
+- React for building the user interface.
+- JavaScript (ES6+) for scripting.
+- Bootstrap for styling and layout.
+
+## 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

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+name: Build Container
+
+on:
+  push:
+    branches: [ main, develop ]
+    paths:
+      - 'src/**'
+      - 'public/**'
+      - 'package*.json'
+      - 'Dockerfile'
+      - 'Containerfile'
+  pull_request:
+    branches: [ main ]
+    paths:
+      - 'src/**'
+      - 'public/**'
+      - 'package*.json'
+      - 'Dockerfile'
+      - 'Containerfile'
+
+env:
+  IMAGE_NAME: jmespath-playground
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Set up Node.js 24 LTS
+      uses: actions/setup-node@v4
+      with:
+        node-version: '24'
+        cache: 'npm'
+
+    - name: Install dependencies
+      run: npm ci
+
+    - name: Run tests
+      run: npm test -- --coverage --watchAll=false
+
+    - name: Build React application
+      run: npm run build
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Build container image
+      uses: docker/build-push-action@v5
+      with:
+        context: .
+        file: ./Dockerfile
+        push: false
+        tags: ${{ env.IMAGE_NAME }}:latest
+        cache-from: type=gha
+        cache-to: type=gha,mode=max
+
+    - name: Test container
+      run: |
+        docker run --rm -d -p 3000:3000 --name test-container ${{ env.IMAGE_NAME }}:latest
+        sleep 10
+        # Test if the container is responding
+        curl -f http://localhost:3000 || exit 1
+        docker stop test-container
+
+    - name: Upload build artifacts
+      uses: actions/upload-artifact@v4
+      if: success()
+      with:
+        name: build-output
+        path: build/
+        retention-days: 7
+
+  # Optional: Build with multi-platform support for production
+  build-multiplatform:
+    runs-on: ubuntu-latest
+    if: github.ref == 'refs/heads/main'
+    needs: build
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v3
+
+    - name: Build multi-platform image
+      uses: docker/build-push-action@v5
+      with:
+        context: .
+        file: ./Dockerfile
+        platforms: linux/amd64,linux/arm64
+        push: false
+        tags: ${{ env.IMAGE_NAME }}:latest
+        cache-from: type=gha
+        cache-to: type=gha,mode=max