[Optional] Updating Dev Container configuration for consistent MicroProfile tutorial dev environment setup

[ttelang]

Code Changes in this PR

• Removed Unused file .devcontainer.json
• Update devcontainer.json file to ensure development container configuration as below:

Purpose

This devcontainer configuration file creates a consistent, reproducible development environment for:

• Writing MicroProfile tutorial content in AsciiDoc format
• Generating documentation in multiple formats (HTML, PDF)
• Developing and Testing MicroProfile e-Commerce Store application (the sample app for this tutorial).

VS Code Customizations - Extensions

This devcontainer configuration file auto-installs essential VS Code extensions:

• GitHub.copilot: AI pair programming assistant
• asciidoctor.asciidoctor-vscode: AsciiDoc editing and preview
• matt-rudge.auto-open-preview-panel: Automatically opens preview panels
• microprofile-community.vscode-microprofile-pack: MicroProfile-specific tools and language support
• vscjava.vscode-java-pack: Comprehensive Java development tools
• vscjava.vscode-maven: Maven project management
• Open-Liberty.liberty-tools-vscode: Open Liberty server integration (a MicroProfile runtime)

Settings

• Sets bash as the default terminal shell in VS Code

Post-Creation Setup

This configuration file automatically runs the following command after container creation:

• npm install: Installs Node.js dependencies (likely for documentation site generation)
• gem install asciidoctor-pdf: Installs Ruby gem for generating PDF documentation from AsciiDoc files