Add QUICK_START.md for rapid deployment reference

QUICK_START.md

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+# ⚡ Quick Start Guide - Hosting Platform
+
+> **For detailed information, see [DEPLOYMENT.md](./DEPLOYMENT.md)**
+
+## 🎯 Most Common Tasks
+
+### 1. Deploy Latest Code to Production
+
+```bash
+# From local machine
+cd /Users/oguzozturk/AgumentProje/HostingProjesi/MusteriPanel
+git add -A
+git commit -m "Your message"
+git push
+
+# On server
+ssh -i ~/.ssh/id_rsa root@176.96.129.77
+cd /opt/hosting-platform
+git fetch origin && git reset --hard origin/main
+supervisorctl restart hosting-backend
+```
+
+### 2. Check if Everything is Running
+
+```bash
+ssh -i ~/.ssh/id_rsa root@176.96.129.77
+
+# Check services
+supervisorctl status
+
+# Check health
+curl http://localhost:5000/health
+
+# Check logs
+tail -f /var/log/hosting-backend.log
+```
+
+### 3. Run Database Migration
+
+```bash
+ssh -i ~/.ssh/id_rsa root@176.96.129.77
+cd /opt/hosting-platform
+sudo -u postgres psql -d hosting -f backend/migrations/YOUR_FILE.sql
+supervisorctl restart hosting-backend
+```
+
+### 4. View Logs
+
+```bash
+ssh -i ~/.ssh/id_rsa root@176.96.129.77
+
+# Backend logs
+tail -f /var/log/hosting-backend.log
+tail -f /var/log/admin-backend.log
+
+# Nginx logs
+tail -f /var/log/nginx/error.log
+```
+
+### 5. Restart Services
+
+```bash
+ssh -i ~/.ssh/id_rsa root@176.96.129.77
+
+# Customer backend
+supervisorctl restart hosting-backend
+
+# Admin backend (manual)
+pkill -f 'admin-panel/backend'
+cd /opt/admin-panel/backend && source venv/bin/activate
+nohup python -m app.main > /var/log/admin-backend.log 2>&1 &
+```
+
+---
+
+## 🔗 Quick Links
+
+- **Customer Panel**: https://panel.argeict.net
+- **Admin Panel**: https://admin.argeict.net
+- **Gitea**: https://gitea.argeict.net
+- **Server IP**: 176.96.129.77
+
+---
+
+## 📁 Important Paths
+
+- **Project**: `/opt/hosting-platform/`
+- **Admin Panel**: `/opt/admin-panel/`
+- **Logs**: `/var/log/hosting-*.log`
+- **Nginx Config**: `/etc/nginx/sites-available/`
+- **Supervisor Config**: `/etc/supervisor/conf.d/`
+
+---
+
+## 🗄️ Database Quick Access
+
+```bash
+# List databases
+sudo -u postgres psql -l
+
+# Connect to main database
+sudo -u postgres psql -d hosting
+
+# Quick queries
+sudo -u postgres psql -d hosting -c "SELECT * FROM customers;"
+sudo -u postgres psql -d hosting -c "SELECT * FROM cloudflare_accounts;"
+```
+
+---
+
+## 🆘 Emergency Commands
+
+```bash
+# If backend is stuck
+supervisorctl restart hosting-backend
+
+# If git pull fails
+cd /opt/hosting-platform
+git fetch origin && git reset --hard origin/main
+
+# If database is locked
+sudo systemctl restart postgresql
+
+# If Nginx has issues
+nginx -t && systemctl restart nginx
+```
+
+---
+
+## 📚 Read This First
+
+**Before any deployment or debugging:**
+1. Read [DEPLOYMENT.md](./DEPLOYMENT.md) for complete details
+2. Check current running processes
+3. Review recent logs
+4. Test locally before deploying
+
+---
+
+**Last Updated**: 2026-01-12
+