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README.md

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-# Notes Application - Docker & Kubernetes Deployment
-
-## Overview
-
-This project is a Notes Application deployed using Docker and Kubernetes (MicroK8s).
-The application allows users to:
-
-- Create notes
-- Delete notes
-- Upload files
-- Download files
-
-It follows a 3-tier architecture:
-
-- Frontend (Nginx)
-- Backend (Node.js)
-- Database (MongoDB)
-
-## Architecture
-
-```
-User -> Frontend (Nginx) -> Backend (Node.js) -> MongoDB
-```
-
-## Containers
-
-### Frontend
-
-- Image: `nginx:alpine`
-- Role: Serves static UI
-- Port: `80`
-
-### Backend
-
-- Image: `node:18`
-- Role: API server (handles notes & files)
-- Port: `3000`
-
-### Database
-
-- Image: `mongo:6.0`
-- Role: Stores notes and file data
-- Port: `27017`
-
-## Kubernetes Resources
-
-- Namespace: `z2`
-- Deployments:
-  - `frontend`
-  - `backend`
-- StatefulSet:
-  - `mongo`
-- Services:
-  - `frontend` (NodePort -> 30007)
-  - `backend` (ClusterIP)
-  - `mongo` (Headless Service)
-
-## Storage
-
-- Persistent Volume Claim: `mongo-storage`
-- Size: `1Gi`
-- Mount path: `/data/db`
-- Purpose: Store MongoDB data persistently
-
-## Setup Instructions
-
-### 1. Prepare Application
-
-```bash
-./prepare-app.sh
-```
-
-- Builds Docker images
-- Loads them into MicroK8s
-
-### 2. Start Application
-
-```bash
-./start-app.sh
-```
-
-- Deploys Kubernetes resources
-- Starts all services
-
-### 3. Stop Application
-
-```bash
-./stop-app.sh
-```
-
-- Stops running pods
-- Keeps configuration
-
-### 4. Delete Application
-
-```bash
-microk8s kubectl delete all --all -n z2
-microk8s kubectl delete pvc --all -n z2
-```
-
-- Removes everything including database
-
-## Access Application
-
-Open in browser:
-
-```
-http://<server-ip>:30007
-```
-
-Example:
-
-```
-http://147.232.204.210:30007
-```
-
-## Useful Commands
-
-Check pods:
-
-```bash
-microk8s kubectl get pods -n z2
-```
-
-Check services:
-
-```bash
-microk8s kubectl get svc -n z2
-```
-
-View logs:
-
-```bash
-microk8s kubectl logs <pod-name> -n z2
-```
-
-## Common Issues
-
-### Mongo Crash (version error)
-
-Fix:
-
-```bash
-microk8s kubectl delete pvc --all -n z2
-```
-
-### Frontend shows "Welcome to nginx"
-
-Fix:
-
-- Ensure `index.html` is copied in Dockerfile
-- Rebuild using:
-
-```bash
-./prepare-app.sh
-```
-
-## Honesty Statement
-
-This project was developed with the assistance of AI tools (such as ChatGPT) for:
-
-- Debugging errors
-- Understanding Kubernetes concepts
-- Identifying fixes for deployment issues
-
-All configurations, testing, and final implementation were completed independently, and the AI was used strictly as a learning aid.