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README.md

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+# My Blog Application
+
+## Description
+This is a blog application where users can add and delete articles easily. The application consists of a form to add articles on the left side and a list of existing articles on the right side.
+
+## Features
+- Add a new article by entering a title and content.
+- View all articles in a clean and structured layout.
+- Delete an article with a single click.
+
+## Installation & Setup
+### Requirements
+- Docker
+- Docker Compose
+
+### Steps to Run the Application
+1. Clone the repository:
+   ```bash
+   git clone <repository_url>
+   cd z1
+   ```
+2. Prepare the application:
+   ```bash
+   ./prepare-app.sh
+   ```
+3. Start the application:
+   ```bash
+   ./start-app.sh
+   ```
+4. Open a web browser and go to:
+   ```
+   http://localhost:5000
+   ```
+
+### Stopping the Application
+To stop the application, run:
+```bash
+./stop-app.sh
+```
+
+### Removing the Application
+To completely remove all data and configurations, run:
+```bash
+./remove-app.sh
+```
+
+## Technology Stack
+- **Backend**: Flask (Python)
+- **Database**: PostgreSQL
+- **Frontend**: HTML + CSS (Embedded in Flask)
+- **Containerization**: Docker & Docker Compose
+
+## How It Works
+- When an article is added, it is stored in a PostgreSQL database.
+- The articles are displayed dynamically on the page.
+- The delete button allows users to remove articles from the database.
+
+## Contact
+If you have any issues, feel free to open an issue or contribute to the project!
+

prepare-app.sh

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+#!/bin/bash
+set -e
+
+echo "Start of preparation"
+
+# Create the volume.
+docker volume create pgdata
+
+# Create the Docker network.
+docker network create app_network 
+
+# Create the Flask application
+docker build -t flask_app_image ./app
+
+echo "Preparation done"

remove-app.sh

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+#!/bin/bash
+set -e
+
+echo "Remove the application"
+
+docker rm -f flask_app postgres_db
+
+# Remove the network and volume
+docker network rm app_network 
+docker volume rm pgdata 
+
+echo "Application removed."
+

start-app.sh

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+#!/bin/bash
+set -e
+
+echo "Start the application"
+
+# Run PostgreSQL container
+docker run -d --name postgres_db \
+	--network app_network \
+	-e 'POSTGRES_USER=user' \
+	-e 'POSTGRES_PASSWORD=password' \
+	-e 'POSTGRES_DB=sampledb' \
+	-v pgdata:/var/lib/postgresql/data \
+	--restart unless-stopped \
+	postgres:13
+
+# Run Flask application container
+docker run -d --name flask_app \
+	--network app_network \
+	-p 5000:5000 \
+	-e 'DB_HOST=postgres_db' \
+	-e 'POSTGRES_USER=user' \
+	-e 'POSTGRES_PASSWORD=password' \
+	-e 'POSTGRES_DB=sampledb' \
+	--restart unless-stopped \
+	flask_app_image
+
+echo "The application is available at http://localhost:5000"

stop-app.sh

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+#!/bin/bash
+set -e
+
+echo "Stop the application..."
+docker stop flask_app postgres_db
+echo "Application stopped."
+