Simplify README: focus on unique features, remove verbose explanations

[Copilot]

The README was verbose (635 lines) with generic mockserver explanations. Condensed to 149 lines focusing on what makes this mockserver unique and how to use it.

Changes

Removed:

• Generic mockserver concepts and CSR vs SSR comparisons
• Multiple installation methods (kept Docker + npm)
• Verbose examples, best practices, troubleshooting sections
• Complete Playwright test suite examples
• Recording script examples

Retained:

• What makes it special: record/replay, proxy mode, SMTP, HTTP API
• Quick start (Docker, npm)
• Three usage patterns with code: Record & Replay (4-step), Manual Mocking, Email Testing
• Complete API reference (11 endpoints)
• Configuration table (5 variables)
• Advanced recording options

Size: 635 → 149 lines (77% reduction)

Example: Record & Replay Pattern

The core workflow is now presented in 4 concise steps instead of lengthy explanations:

// 1. Configure app to use proxy
API_BASE_URL="http://localhost:1080/api.example.com"

// 2. Record
await fetch('http://localhost:1080/mock/recordings', {
  body: JSON.stringify({ active: true })
});

// 3. Export
const recordings = await fetch('http://localhost:1080/mock/recordings').then(r => r.json());

// 4. Replay in tests
await fetch('http://localhost:1080/mock/recordings', {
  body: JSON.stringify({ active: false, recordings })
});

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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.