Add Helm chart documentation

oramap/README.md

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+# Ora Map Helm Chart
+
+Helm chart for deploying Ora Map application in Kubernetes with microservices architecture.
+
+## Architecture
+
+This chart deploys two main components:
+
+- **Backend**: Node.js Express API server (Port 3000)
+- **Frontend**: Nginx serving static files (Port 80)
+
+## Installation
+
+### Prerequisites
+
+- Kubernetes cluster 1.19+
+- Helm 3.0+
+- Docker images built and pushed to Harbor registry
+
+### Install Chart
+
+```bash
+# From the repository root
+helm install oramap ./oramap
+
+# Or with custom values
+helm install oramap ./oramap -f custom-values.yaml
+
+# Install in a specific namespace
+helm install oramap ./oramap -n my-namespace --create-namespace
+```
+
+### Upgrade Chart
+
+```bash
+helm upgrade oramap ./oramap
+```
+
+### Uninstall Chart
+
+```bash
+helm uninstall oramap
+```
+
+## Configuration
+
+The following table lists the configurable parameters and their default values:
+
+| Parameter | Description | Default |
+|-----------|-------------|---------|
+| `backend.image.repository` | Backend image repository | `harbor.dvirlabs.com/my-apps/oramap-backend` |
+| `backend.image.tag` | Backend image tag | `latest` |
+| `backend.replicaCount` | Number of backend replicas | `1` |
+| `backend.containerPort` | Backend container port | `3000` |
+| `backend.resources.limits.cpu` | Backend CPU limit | `500m` |
+| `backend.resources.limits.memory` | Backend memory limit | `512Mi` |
+| `frontend.image.repository` | Frontend image repository | `harbor.dvirlabs.com/my-apps/oramap-frontend` |
+| `frontend.image.tag` | Frontend image tag | `latest` |
+| `frontend.replicaCount` | Number of frontend replicas | `1` |
+| `frontend.containerPort` | Frontend container port | `80` |
+| `service.type` | Kubernetes service type | `ClusterIP` |
+| `ingress.enabled` | Enable ingress | `true` |
+| `ingress.className` | Ingress class name | `traefik` |
+| `ingress.hosts[0].host` | Ingress hostname | `oramap.dvirlabs.com` |
+
+### Example Custom Values
+
+```yaml
+# custom-values.yaml
+backend:
+  image:
+    tag: "v1.0.0"
+  replicaCount: 3
+
+frontend:
+  image:
+    tag: "v1.0.0"
+  replicaCount: 2
+
+ingress:
+  hosts:
+    - host: oramap.example.com
+      paths:
+        - path: /
+          pathType: Prefix
+  tls:
+    - secretName: oramap-tls
+      hosts:
+        - oramap.example.com
+```
+
+## Deployment Components
+
+### Backend Deployment
+
+- Runs Express.js API server
+- Health checks on `/api/health`
+- Configurable resources and replicas
+
+### Frontend Deployment
+
+- Runs Nginx serving static files
+- Proxies `/api/*` requests to backend service
+- Uses ConfigMap for nginx configuration
+- Health checks on `/`
+
+### Services
+
+- **Backend Service**: Internal ClusterIP service on port 3000
+- **Frontend Service**: ClusterIP service on port 80 (exposed via Ingress)
+
+### Ingress
+
+- Routes external traffic to frontend service
+- TLS/SSL termination support
+- Configurable hostname and paths
+
+## CI/CD Integration
+
+The Woodpecker CI pipeline automatically:
+
+1. Builds backend and frontend Docker images
+2. Tags with branch name and commit SHA
+3. Pushes to Harbor registry
+4. Updates this chart's values in the GitOps repository
+
+## Accessing the Application
+
+After installation, the application will be available at:
+
+- **External**: https://oramap.dvirlabs.com (via Ingress)
+- **Internal Backend API**: http://oramap-backend:3000
+- **Internal Frontend**: http://oramap-frontend:80
+
+## Troubleshooting
+
+### Check Pod Status
+
+```bash
+kubectl get pods -l release=oramap
+```
+
+### View Logs
+
+```bash
+# Backend logs
+kubectl logs -l app=oramap-backend
+
+# Frontend logs
+kubectl logs -l app=oramap-frontend
+```
+
+### Check Services
+
+```bash
+kubectl get svc -l release=oramap
+```
+
+### Test Backend Health
+
+```bash
+kubectl port-forward svc/oramap-backend 3000:3000
+curl http://localhost:3000/api/health
+```
+
+## Version History
+
+- **0.2.0**: Microservices architecture with separate backend and frontend
+- **0.1.0**: Initial monolithic deployment