Improve NodeJS Installation Instructions

[bhouston]

Improve NodeJS Installation Instructions

Currently, our getting started guides mention NodeJS as a prerequisite but could provide more detailed installation guidance.

Tasks:

• Emphasize that NodeJS runtime is required for MyCoder
• Add dedicated sections on installing NodeJS in each OS-specific getting started guide
• Recommend NVM (Node Version Manager) as the preferred method for installing NodeJS
  • NVM is available for all platforms (Linux, macOS, and Windows)
  • Provides easier version management and switching
  • Avoids permission issues common with global npm installations

Benefits:

• Smoother onboarding experience for new users
• Consistent installation approach across platforms
• Better version management for users

References:

• NVM for Linux/macOS
• NVM for Windows