Add file.sh for docker

z1/prepare-app.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+echo "Preparing app"
+
+# Create the Docker volume if it doesn't exist
+docker volume create pgdata
+
+# Create the custom Docker network
+docker network create app_net 2>/dev/null || echo "Network app_net already exists."
+
+# Build the Flask application image from the Dockerfile in the ./app folder.
+docker build -t flask_app_image ./app
+
+echo "Prepa completed."

z1/remove-app.sh

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+#!/bin/bash
+echo "Removing app"
+
+# Remove the containers forcefully.
+docker rm -f flask_app postgres_db
+
+# Remove the custom network and volume if they exist.
+docker network rm app_net 2>/dev/null || echo "Network app_net already removed."
+docker volume rm pgdata 2>/dev/null || echo "Volume pgdata already removed."
+
+echo "Application removed."
+

z1/start-app.sh

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+#!/bin/bash
+echo "Starting app"
+
+# Run PostgreSQL container
+docker run -d --name postgres_db \
+  --network app_net \
+  -e POSTGRES_USER=user \
+  -e POSTGRES_PASSWORD=password \
+  -e POSTGRES_DB=sampledb \
+  -v pgdata:/var/lib/postgresql/data \
+  --restart always \
+  postgres:13
+# Wait a few seconds to ensure PostgreSQL starts before the Flask app connects.
+sleep 10
+
+# Run Flask application container
+docker run -d --name flask_app \
+  --network app_net \
+  -p 5000:5000 \
+  --restart always \
+  -e DB_HOST=postgres_db \
+  -e POSTGRES_USER=user \
+  -e POSTGRES_PASSWORD=password \
+  -e POSTGRES_DB=sampledb \
+  flask_app_image
+
+echo "The application is available at http://localhost:5000"
+

z1/stop-app.sh

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+#!/bin/bash
+echo "Stopping app"
+
+docker stop flask_app postgres_db
+
+echo "Application stopped."
+~