This assignment will guide you through designing and deploying a 3-tier application architecture using Docker Compose. The 3-tier architecture includes a web server (frontend), an application server (backend), and a database server (DB). Each tier is containerized and orchestrated using Docker Compose.

You will create a simple web application with the following components:

1. Web Server (Frontend): A Nginx server to serve static content and act as a reverse proxy for the application server.
2. Application Server (Backend): A Python Flask application that handles business logic and interacts with the database.
3. Database Server: A PostgreSQL database to store application data.

• Use PostgreSQL as the database.
• Initialize the database with a schema and some sample data.
• Expose the necessary port to allow the application server to connect.

• Create a Flask application that:
  • Connects to the database to fetch and store data.
  • Exposes RESTful APIs for the web server to consume.
• Use environment variables to configure database credentials.

• Use Nginx to serve static files.
• Configure Nginx as a reverse proxy to forward API requests to the application server.

• Define all three services (web, app, db) in a docker-compose.yml file.
• Set up networking to allow communication between the services.
• Use Docker volumes for persistent data storage.

1. A docker-compose.yml file to orchestrate the services.
2. Configuration files for the database, application, and web server.
3. A fully functional 3-tier application accessible from the browser.
4. A README.md with clear setup and deployment instructions.