Application Deployment with Docker and Instance-based Services

Context Overview

You are tasked with deploying a backend application using Docker while integrating it with services installed directly on an EC2 instance. This setup demonstrates understanding of containerized applications communicating with traditional instance-based services.

Infrastructure Setup

Instance Configuration

• EC2 Instance: t2.micro (or similar)
• Operating System: Ubuntu 22.04 LTS
• Required packages:
  • PostgreSQL 14 or later
  • Nginx (latest stable version)
  • Docker

Requirements

Main Tasks

1. PostgreSQL Setup

   • Install PostgreSQL directly on the EC2 instance
   • Configure PostgreSQL to accept connections from Docker containers
   • Create necessary database and user
   • Secure the database with proper credentials
   • Ensure PostgreSQL is running on port 5432

2. Application Containerization

   • Create Dockerfile for the backend application
   • Configure environment variables for database connection
   • Build and run the container
   • Ensure proper network configuration to connect to host PostgreSQL
   • Application should run on port 8000

3. Nginx Configuration

   • Install Nginx on the EC2 instance
   • Configure as reverse proxy to the Docker container
   • Handle static file serving
   • Basic security headers implementation
   • Listen on port 80

Optional Task: CI/CD with GitHub

1. GitHub Actions Workflow
   • Automated testing
   • Docker image building
   • Deployment to EC2 instance
   • Environment variable management