[INIT-001] Initial project setup with Clean Architecture (feat)

- Implemented Clean Architecture with Domain, Application, Infrastructure, Presentation layers
- Added comprehensive project structure following SOLID principles
- Created Kubernetes deployment with Helm charts (HPA, PDB, NetworkPolicy)
- Configured ArgoCD for automated deployment (production + staging)
- Implemented CI/CD pipeline with GitHub Actions
- Added comprehensive documentation (handbook, architecture, coding standards)
- Configured PostgreSQL, Redis, Celery for backend services
- Created modern landing page with Persian fonts (Vazirmatn)
- Added Docker multi-stage build for production
- Configured development tools (pytest, black, flake8, mypy, isort)
- Added pre-commit hooks for code quality
- Implemented Makefile for common operations

docs/deployment/kubernetes.md

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+# راهنمای Deployment روی Kubernetes با Helm
+
+این راهنما نحوه deploy کردن پلتفرم Peikarband روی Kubernetes با استفاده از Helm Chart را توضیح می‌دهد.
+
+## پیش‌نیازها
+
+### 1. ابزارهای مورد نیاز
+
+```bash
+# Kubectl (v1.24+)
+kubectl version --client
+
+# Helm (v3.10+)
+helm version
+
+# Docker (برای build local)
+docker --version
+```
+
+### 2. دسترسی به Kubernetes Cluster
+
+```bash
+# تست دسترسی
+kubectl cluster-info
+kubectl get nodes
+```
+
+### 3. Namespace ها
+
+```bash
+# ساخت namespace ها
+kubectl create namespace production
+kubectl create namespace staging
+```
+
+## ساختار Helm Chart
+
+```
+helm/peikarband/
+├── Chart.yaml              # Metadata
+├── values.yaml            # Default values
+├── values-production.yaml # Production overrides
+├── templates/
+│   ├── _helpers.tpl       # Helper templates
+│   ├── deployment.yaml    # Deployment
+│   ├── service.yaml       # Service
+│   ├── ingress.yaml       # Ingress
+│   ├── configmap.yaml     # ConfigMap
+│   ├── serviceaccount.yaml
+│   ├── hpa.yaml          # Horizontal Pod Autoscaler
+│   ├── pdb.yaml          # Pod Disruption Budget
+│   ├── networkpolicy.yaml
+│   └── NOTES.txt
+└── .helmignore
+```
+
+## مراحل Deployment
+
+### 1. آماده‌سازی Secrets
+
+ابتدا باید secrets مورد نیاز را ایجاد کنید:
+
+```bash
+# Database credentials
+kubectl create secret generic peikarband-secrets \
+  --from-literal=db-username=peikarband \
+  --from-literal=db-password=STRONG_PASSWORD_HERE \
+  --from-literal=redis-password=REDIS_PASSWORD_HERE \
+  -n production
+
+# برای staging
+kubectl create secret generic peikarband-secrets \
+  --from-literal=db-username=peikarband \
+  --from-literal=db-password=STAGING_PASSWORD \
+  --from-literal=redis-password=REDIS_PASSWORD \
+  -n staging
+```
+
+### 2. Build و Push Docker Image
+
+#### روش اول: با GitHub Actions (توصیه می‌شود)
+
+```bash
+# فقط یک tag بزنید و GitHub Actions خودکار build و deploy می‌کند
+git tag -a v0.1.0 -m "Release v0.1.0"
+git push origin v0.1.0
+```
+
+#### روش دوم: Build دستی
+
+```bash
+# Build image
+docker build -t peikarband/landing:0.1.0 .
+
+# Tag for registry
+docker tag peikarband/landing:0.1.0 registry.example.com/peikarband/landing:0.1.0
+
+# Push
+docker push registry.example.com/peikarband/landing:0.1.0
+```
+
+### 3. Validate Helm Chart
+
+قبل از deploy، chart را validate کنید:
+
+```bash
+# Lint
+helm lint helm/peikarband
+
+# Dry-run
+helm install peikarband-test ./helm/peikarband \
+  --dry-run \
+  --debug \
+  --namespace production
+
+# Template rendering
+helm template peikarband ./helm/peikarband > rendered.yaml
+```
+
+### 4. Deploy به Staging
+
+```bash
+helm upgrade --install peikarband-staging ./helm/peikarband \
+  --namespace staging \
+  --create-namespace \
+  --set image.repository=registry.example.com/peikarband/landing \
+  --set image.tag=0.1.0 \
+  --set ingress.hosts[0].host=staging.peikarband.ir \
+  --set replicaCount=2 \
+  --wait \
+  --timeout 5m
+```
+
+### 5. تست Staging
+
+```bash
+# چک کردن pods
+kubectl get pods -n staging
+
+# چک کردن logs
+kubectl logs -f deployment/peikarband-staging -n staging
+
+# Port forward برای تست local
+kubectl port-forward svc/peikarband-staging 3000:3000 -n staging
+
+# تست health check
+curl http://localhost:8000/ping
+```
+
+### 6. Deploy به Production
+
+```bash
+helm upgrade --install peikarband-prod ./helm/peikarband \
+  --namespace production \
+  --create-namespace \
+  --set image.repository=registry.example.com/peikarband/landing \
+  --set image.tag=0.1.0 \
+  --values helm/peikarband/values-production.yaml \
+  --wait \
+  --timeout 10m
+```
+
+## پیکربندی‌های مهم
+
+### 1. تغییر تعداد Replicas
+
+```bash
+# با Helm
+helm upgrade peikarband-prod ./helm/peikarband \
+  --namespace production \
+  --reuse-values \
+  --set replicaCount=5
+
+# یا با kubectl
+kubectl scale deployment peikarband-prod --replicas=5 -n production
+```
+
+### 2. Update Image Version
+
+```bash
+helm upgrade peikarband-prod ./helm/peikarband \
+  --namespace production \
+  --reuse-values \
+  --set image.tag=0.2.0
+```
+
+### 3. تغییر Resources
+
+```bash
+helm upgrade peikarband-prod ./helm/peikarband \
+  --namespace production \
+  --reuse-values \
+  --set resources.limits.cpu=2000m \
+  --set resources.limits.memory=2Gi
+```
+
+### 4. فعال/غیرفعال کردن Autoscaling
+
+```bash
+# فعال کردن
+helm upgrade peikarband-prod ./helm/peikarband \
+  --namespace production \
+  --reuse-values \
+  --set autoscaling.enabled=true \
+  --set autoscaling.minReplicas=3 \
+  --set autoscaling.maxReplicas=10
+
+# غیرفعال کردن
+helm upgrade peikarband-prod ./helm/peikarband \
+  --namespace production \
+  --reuse-values \
+  --set autoscaling.enabled=false \
+  --set replicaCount=3
+```
+
+## Ingress و SSL/TLS
+
+### نصب cert-manager (برای Let's Encrypt)
+
+```bash
+# نصب cert-manager
+kubectl apply -f https://github.com/cert-manager/cert-manager/releases/download/v1.13.0/cert-manager.yaml
+
+# ساخت ClusterIssuer
+cat <<EOF | kubectl apply -f -
+apiVersion: cert-manager.io/v1
+kind: ClusterIssuer
+metadata:
+  name: letsencrypt-prod
+spec:
+  acme:
+    server: https://acme-v02.api.letsencrypt.org/directory
+    email: admin@peikarband.ir
+    privateKeySecretRef:
+      name: letsencrypt-prod
+    solvers:
+    - http01:
+        ingress:
+          class: nginx
+EOF
+```
+
+### پیکربندی DNS
+
+```bash
+# A Record برای domain اصلی
+peikarband.ir.         A     YOUR_CLUSTER_IP
+
+# CNAME برای www
+www.peikarband.ir.     CNAME peikarband.ir.
+```
+
+## Monitoring و Logs
+
+### 1. مشاهده Logs
+
+```bash
+# تمام pods
+kubectl logs -f deployment/peikarband-prod -n production
+
+# یک pod خاص
+kubectl logs -f peikarband-prod-xxxxx-yyyyy -n production
+
+# تمام logs (از همه pods)
+kubectl logs -l app.kubernetes.io/name=peikarband -n production --tail=100
+```
+
+### 2. مشاهده Events
+
+```bash
+kubectl get events -n production --sort-by='.lastTimestamp'
+```
+
+### 3. چک کردن Resource Usage
+
+```bash
+# CPU و Memory
+kubectl top pods -n production
+
+# Metrics از deployment
+kubectl top deployment peikarband-prod -n production
+```
+
+### 4. HPA Status
+
+```bash
+kubectl get hpa -n production
+kubectl describe hpa peikarband-prod -n production
+```
+
+## Rollback
+
+### 1. مشاهده History
+
+```bash
+# Helm releases
+helm history peikarband-prod -n production
+
+# Kubernetes rollout history
+kubectl rollout history deployment/peikarband-prod -n production
+```
+
+### 2. Rollback با Helm
+
+```bash
+# به نسخه قبلی
+helm rollback peikarband-prod -n production
+
+# به نسخه خاص
+helm rollback peikarband-prod 3 -n production
+```
+
+### 3. Rollback با Kubectl
+
+```bash
+# به نسخه قبلی
+kubectl rollout undo deployment/peikarband-prod -n production
+
+# به نسخه خاص
+kubectl rollout undo deployment/peikarband-prod --to-revision=2 -n production
+```
+
+## Troubleshooting
+
+### Pod در حالت Pending
+
+```bash
+# بررسی events
+kubectl describe pod POD_NAME -n production
+
+# چک کردن resources
+kubectl describe nodes
+```
+
+### Pod در حالت CrashLoopBackOff
+
+```bash
+# مشاهده logs
+kubectl logs POD_NAME -n production --previous
+
+# مشاهده events
+kubectl describe pod POD_NAME -n production
+```
+
+### Image Pull Error
+
+```bash
+# چک کردن imagePullSecrets
+kubectl get secrets -n production
+
+# بررسی pod
+kubectl describe pod POD_NAME -n production
+```
+
+### Health Check Failing
+
+```bash
+# تست مستقیم health endpoint
+kubectl exec -it POD_NAME -n production -- curl localhost:8000/ping
+
+# بررسی liveness/readiness probes
+kubectl describe pod POD_NAME -n production
+```
+
+## Clean Up
+
+### حذف Release
+
+```bash
+# حذف کامل
+helm uninstall peikarband-prod -n production
+
+# با نگه داشتن history
+helm uninstall peikarband-prod -n production --keep-history
+```
+
+### حذف Namespace
+
+```bash
+kubectl delete namespace production
+```
+
+## Best Practices
+
+### 1. Always use specific image tags
+```yaml
+image:
+  tag: "v0.1.0"  # ✅ Good
+  # tag: "latest"  # ❌ Bad
+```
+
+### 2. Set resource limits
+```yaml
+resources:
+  limits:
+    cpu: 1000m
+    memory: 1Gi
+  requests:
+    cpu: 250m
+    memory: 512Mi
+```
+
+### 3. Enable autoscaling برای production
+```yaml
+autoscaling:
+  enabled: true
+  minReplicas: 3
+  maxReplicas: 10
+```
+
+### 4. استفاده از Pod Disruption Budget
+```yaml
+podDisruptionBudget:
+  enabled: true
+  minAvailable: 1
+```
+
+### 5. NetworkPolicy برای امنیت
+```yaml
+networkPolicy:
+  enabled: true
+```
+
+## CI/CD Integration
+
+### GitHub Actions
+
+workflow ما به صورت خودکار:
+
+1. ✅ Build Docker image
+2. ✅ Push به registry
+3. ✅ Package Helm chart
+4. ✅ Deploy به staging (on push to main)
+5. ✅ Deploy به production (on tag)
+6. ✅ Create GitHub release
+
+### Manual Trigger
+
+```bash
+# از طریق GitHub UI: Actions → CD → Run workflow
+```
+
+## Support
+
+برای مشکلات و سوالات:
+- 📧 Email: support@peikarband.ir
+- 💬 Telegram: @peikarband_support
+- 📚 Docs: https://docs.peikarband.ir
+