Node.js + Express & Java Spring Boot + Thymeleaf Demo Apps

This project contains two separate full-stack applications that serve the same purpose but are implemented in different technologies:

• Node.js App: Express.js backend rendering HTML pages using the Pug template engine
• Java App: Spring Boot backend rendering HTML pages using Thymeleaf templates

Both apps are structured for easy local development and deployment to SAP BTP Cockpit using Cloud Foundry.

Getting Started Locally

Start Locally

Option 1: Run Node.js App Locally

Prerequisites

• Node.js (v18+ recommended)

cd node-backend
npm install
npm start

You can view the app at:

http://localhost:3000

Option 2: Run Java App Locally

Prerequisites

• Java (v17+ recommended)
• Maven (for building the Java app)

cd java-backend
mvn clean install
mvn spring-boot:run

You can view the app at:

http://localhost:8080

Deploying to SAP BTP

Each app is deployed independently and works as a self-contained full-stack app.

Node.js App

cd node-backend
npm run build
npm run zip
cd ..

This will prepare a build.zip ready for deployment.

1. Make sure the build.zip is located in the root directory.
2. Check your manifest.yaml, located in node-backend/manifest.yaml
3. Deploy the frontend using the BTP Cockpit UI:
   • Go to Applications page and click Deploy button
   • Upload the ZIP file from node-backend/build.zip
   • Upload the node-backend/manifest.yaml

Make sure the application started successfully and is running.

Java App

cd java-backend
mvn clean install
cd ..

1. Make sure the JAR is located in java-backend/target/java-demo-app-0.0.1-SNAPSHOT.jar
2. Check your manifest.yaml, located in java-backend/manifest.yaml
3. Deploy the backend using the BTP Cockpit UI:
   • Go to Applications page and click Deploy button
   • Upload the JAR file from java-backend/target/java-demo-app-0.0.1-SNAPSHOT.jar
   • Upload the java-backend/manifest.yaml

Make sure the application started successfully and is running.

Environment Variables

Each app is configured to use environment variable for customization. By default, it is set to false. If you want to switch to dark theme, you can set the environment variable DARK_MODE to true in your BTP environment.