Docker image packaging of a simple Spring Boot web app to list values from PostgreSQL DB. Created for an optional Docker course project.

1. Clone the project and navigate to it:

git clone https://github.com/g-otn/soat-docker-challenge.git cd soat-docker-challenge

2. Make sure port 80 is not in use.
3. Run Docker Compose:

docker compose up # or docker-compose up

4. Wait for the Spring Boot app to startup.
5. Access http://localhost/programming-languages and you should see a JSON array listing some programming languages, retrieved from the db container.

To build the backend image:

1. Open and configure the backend/ project with your Java IDE.
2. Compile and package it using Maven.
3. Build the Dockerfile.
   • e.g: docker buildx build -t g0tn/soat-docker-challenge-backend backend
   • Build arguments:

     arg	description	default
     JAR_FILE	Path to packaged .jar file	target/dockerchallenge-0.0.1.jar

   • Environment variables:

     env var	description	default
     APP_USER	Internal user for running the app	backend
     APP_FOLDER	Working directory where the jar will be copied to	/opt/app

• Prof. Luiz Zenha and Prof. Matheus Pavani: Course teachers.
• marcelovbcfilho: Help with Docker Compose.