Spring Boot Docker Compose Demo

This project demonstrates how to containerize a Spring Boot application using Docker and Docker Compose, with a PostgreSQL database.

Prerequisites

• Docker Desktop (with Docker Compose)
• Java 21+
• Maven

Getting Started

1. Clone the Repository

git clone <repository-url>

2. Create a .env File

Create a .env file in the project root with the following content:

POSTGRES_DB=testDB
POSTGRES_USER=postgres
POSTGRES_PASSWORD=postgres

You can change these values as needed, but make sure they match the configuration in application.properties and docker-compose.yaml.

3. Build and Run with Docker Compose

docker compose up --build

• The Spring Boot app will be available at http://localhost:8085
• PostgreSQL will be available at localhost:5432

4. Stopping the Application

docker compose down

Project Structure

• Dockerfile - Multi-stage build for Spring Boot app
• docker-compose.yaml - Defines services for the app and PostgreSQL
• init/init.sql - SQL script to initialize the database
• src/ - Application source code

Notes

• The application uses environment variables for database configuration.
• The database is initialized with sample data from init/init.sql.

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That's all!