v1.0.0 - First stable CI/CD version

Changes in v1.0.0 — First stable CI/CD version

Application

• Implemented basic calculator endpoints (add, subtract, multiply, divide)
• Added unit tests for CalculatorService using JUnit

Build & Packaging

• Configured Maven project structure
• Enabled JAR packaging via Maven

Docker

• Added Dockerfile for runtime image
• Added Dockerfile.ci for multi-stage CI builds
• Successfully pushed automated Docker images to Docker Hub (fernandotelheiro/devcalc-api)

CI/CD (GitHub Actions)

• Implemented CI workflow running:
  • Code checkout
  • JDK setup
  • Unit tests
  • Packaging
  • Docker build and publish

Security & Automation

• Added DOCKERHUB_USERNAME and DOCKERHUB_TOKEN secrets
• Implemented secure authentication for Docker Hub publishing