Add comprehensive SETUP.md with detailed development environment instructions

[Copilot]

This PR addresses the need for better setup instructions by creating a comprehensive SETUP.md file that guides first-time users through setting up their development environment for the Contoso Voice Agent project.

What's Added

A new SETUP.md file (337 lines) that provides complete development setup guidance including:

📋 Prerequisites & System Requirements

• Required software versions (Python 3.12+, Node.js 18+, npm, Git)
• Optional tools (VS Code, Docker, Azure CLI)
• System specifications (OS compatibility, RAM, disk space)

🔧 Environment Configuration

• Complete Azure OpenAI setup with both chat (GPT-4o) and voice (Realtime API) credentials
• Proper .env file configuration with all required variables:

  AZURE_OPENAI_ENDPOINT=your_azure_openai_endpoint
  AZURE_OPENAI_API_KEY=your_azure_openai_api_key
  AZURE_VOICE_ENDPOINT=your_azure_voice_endpoint
  AZURE_VOICE_KEY=your_azure_voice_api_key
  LOCAL_TRACING_ENABLED=true

🚀 Step-by-Step Setup Instructions

Backend API Setup:

• Virtual environment creation and activation
• Dependency installation with pip install -r api/requirements.txt
• Correct startup command: uvicorn api.main:app --reload (from project root)

Frontend Web Setup:

• npm dependency installation
• Development server startup with npm run dev

🏃‍♂️ Multiple Ways to Run Everything

1. Terminal Method - Separate terminals for backend and frontend
2. VS Code Method - Using pre-configured launch settings (F5)
3. Docker Method - Containerized development environment

🚀 GitHub Actions Deployment Documentation

Comprehensive explanation of Azure Container Apps deployment workflows:

API Deployment (.github/workflows/azure-container-api.yml):

• Automated triggers (push to main with api/ changes)
• Build process with Docker and Azure Container Registry
• Environment variable configuration with secrets
• Container Apps deployment with proper scaling

Web Deployment (.github/workflows/azure-container-web.yml):

• Dynamic endpoint configuration for production
• Frontend build optimization
• Auto-scaling setup (1-5 replicas, 100 concurrent requests)

🛠️ Additional Support Features

• Troubleshooting section for common development issues
• Testing instructions for both backend (pytest) and frontend (npm lint/build)
• Performance tips for optimal development experience
• Project structure overview linking back to README.md

Validation

All setup instructions have been tested and verified:

• ✅ Backend dependency installation successful
• ✅ Frontend dependency installation successful
• ✅ Backend tests passing with pytest
• ✅ Frontend linting and build successful
• ✅ No breaking changes to existing workflow

The new setup guide provides everything a first-time developer needs to get the Contoso Voice Agent running locally and understand the deployment process to Azure.

Fixes #18.

Warning

Firewall rules blocked me from connecting to one or more addresses

I tried to connect to the following addresses, but was blocked by firewall rules:

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to my firewall allow list

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💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.