Logger app

[nickdos]

https://logger.ala.org.au - GH project logger-service & ala-logger (lib)

• [ ] Upgrade to Grails 3 & BS3 (?needed?) OR check using 2.5.6 (OK)
• [ ] Check and fix issues
• [ ] Implement GitFlow (?)
• [ ] Check reason codes/names are in sync between service, downloads and dashboard
• [ ] Release new version and deploy to prod