Docker Web Application Deployment

The application consists of two services:

Web Service (Nginx):
- Uses the official Nginx image.
- Listens on port 80 inside the container and is mapped to host port 8080.
Database Service (MySQL 5.7):
- Uses the official MySQL 5.7 image.
- Configured with a root password and a default database.
- Persists its data using the named volume mysql-data.

Files Overview

prepare-app.sh:
- Creates the required Docker network (myapp-net) and persistent volume (mysql-data).
docker-compose.yaml:
- Defines the two services along with their ports, environment variables, volumes, and restart policies.
start-app.sh:
- Starts the services using Docker Compose in detached mode.
- Displays the URL to access the web service.
stop-app.sh:
- Stops the running containers without deleting the persistent volume.
remove-app.sh:
- Removes all the created resources (containers, network, and volume) from the deployment.

Preparation:
- Ensure Docker and Docker Compose are installed.
- Make the scripts executable:
```
chmod +x prepare-app.sh start-app.sh stop-app.sh remove-app.sh
```
- Run the preparation script:
```
./prepare-app.sh
```
Starting the Application:
- Launch the services by running:
```
./start-app.sh
```
- Open your web browser and navigate to http://localhost:8080 to see the Nginx welcome page.
Stopping the Application:
- Stop the services without losing data:
```
./stop-app.sh
```
Removing the Application:
- To completely remove all deployed resources, run:
```
./remove-app.sh
```

The application uses an external network (myapp-net) and a persistent volume (mysql-data) that are created in prepare-app.sh.
The Nginx container depends on the MySQL container to demonstrate inter-service communication within the myapp-net network.
Containers are configured to restart on failure.