message: Added logo to app.json
diff: {
  "name": "JHipster Registry",
  "description": "This is the JHipster registry service, based on Spring Cloud Netflix, Eureka and Spring Cloud Config.",
  + "logo": "https://jhipster.github.io/images/logo/logo-jhipster-drink-coffee.png",
  "env": {
  "JHIPSTER_PASSWORD": {
  "description": "Admin password for the registry (used to login after clicking 'View App'). Must be at least 5 characters.",
  