Add quick start guide for rapid onboarding

Co-authored-by: ketanMehtaa <45426198+ketanMehtaa@users.noreply.github.com>

Author: Copilot

packages/twenty-server/QUICK_START.md

@@ -0,0 +1,146 @@
+# Twenty Server - Quick Start Guide
+
+Get Twenty Server up and running in minutes!
+
+## Prerequisites
+
+- Node.js 24.5.0+
+- PostgreSQL 15+
+- Redis 7+
+- Yarn 4+
+
+## 5-Minute Setup
+
+### 1. Start Required Services
+
+```bash
+# PostgreSQL
+docker run -d --name twenty-postgres \
+  -p 5432:5432 \
+  -e POSTGRES_PASSWORD=postgres \
+  -e POSTGRES_DB=twenty \
+  postgres:15
+
+# Redis
+docker run -d --name twenty-redis \
+  -p 6379:6379 \
+  redis:7-alpine
+```
+
+### 2. Configure Environment
+
+```bash
+cd packages/twenty-server
+cp .env.example .env
+```
+
+Edit `.env`:
+```bash
+PG_DATABASE_URL=postgres://postgres:postgres@localhost:5432/twenty
+REDIS_URL=redis://localhost:6379
+APP_SECRET=change_this_to_a_random_string
+FRONTEND_URL=http://localhost:3001
+```
+
+### 3. Initialize Database
+
+```bash
+npx nx database:reset twenty-server
+```
+
+### 4. Start Server
+
+```bash
+npx nx start twenty-server
+```
+
+Server runs at: `http://localhost:3000`
+
+## Test Your Setup
+
+### Health Check
+```bash
+curl http://localhost:3000/healthz
+```
+
+### GraphQL Playground
+Open in browser: `http://localhost:3000/graphql`
+
+### Sample Query
+```graphql
+query GetWorkspace {
+  currentWorkspace {
+    id
+    name
+  }
+}
+```
+
+## Next Steps
+
+- 📖 Read [README.md](./README.md) for comprehensive overview
+- 🏗️ See [ARCHITECTURE.md](./ARCHITECTURE.md) for architecture details
+- 🔌 Check [API.md](./API.md) for API reference
+- 💻 Follow [DEVELOPMENT.md](./DEVELOPMENT.md) for development guide
+- 📊 View [DIAGRAMS.md](./DIAGRAMS.md) for visual architecture
+
+## Common Commands
+
+```bash
+# Development
+npx nx start twenty-server              # Start server
+npx nx run twenty-server:worker         # Start background worker
+
+# Database
+npx nx database:reset twenty-server     # Reset database
+yarn database:migrate:prod              # Run migrations
+
+# Testing
+npx nx test twenty-server               # Unit tests
+npx nx run twenty-server:test:integration:with-db-reset  # Integration tests
+
+# Code Quality
+npx nx lint twenty-server --fix         # Lint and fix
+npx nx typecheck twenty-server          # Type check
+```
+
+## Troubleshooting
+
+**Port 3000 in use?**
+```bash
+lsof -ti:3000 | xargs kill -9
+# Or change NODE_PORT in .env
+```
+
+**Database connection failed?**
+```bash
+docker ps | grep postgres
+docker start twenty-postgres
+```
+
+**Redis connection failed?**
+```bash
+docker ps | grep redis
+docker start twenty-redis
+```
+
+## Documentation Index
+
+All documentation is in `/packages/twenty-server/`:
+
+- **[DOCS.md](./DOCS.md)** - Documentation index
+- **[README.md](./README.md)** - Main documentation (24KB)
+- **[ARCHITECTURE.md](./ARCHITECTURE.md)** - Architecture deep-dive (18KB)
+- **[API.md](./API.md)** - Complete API reference (20KB)
+- **[DEVELOPMENT.md](./DEVELOPMENT.md)** - Development guide (22KB)
+- **[DIAGRAMS.md](./DIAGRAMS.md)** - Visual diagrams (20KB)
+
+## Support
+
+- 💬 Discord: [discord.gg/twenty](https://discord.gg/twenty)
+- 📧 Email: felix@twenty.com
+- 🐛 Issues: [GitHub Issues](https://github.com/twentyhq/twenty/issues)
+
+---
+
+**Happy Coding! 🚀**