A sample project how to use Spring Boot as your primary middleware serve, a.k.a. "backend for frontend". Spring Boot acts as

• web server for static resources
  • handling '', '/', '/index'
  • handling all spa routes, return the index.html with Statuscode 200
  • handling of bundled resources (js, css, assets)
• REST endpoint (or graphQL) - like handling '/api'
• gateway to other REST services that should be integrated in a more tightly way (This should be mainly handled by sth like spring-cloud-router (Zuul)), this includes
  • handling sth like '/api/*
  • handling CORS
  • handling OAuth2 (bearer token)
  • potential model transformation

NOTE: it is not intended to replace an API gateway!