fix(cms): improve health check with DB verification and add maintenance error page#417

hakalb merged 3 commits intomaincodeware-sthlm/codeware:mainfrom

cod-378-improve-health-check-and-add-maintenance-error-pagecodeware-sthlm/codeware:cod-378-improve-health-check-and-add-maintenance-error-pageCopy head branch name to clipboard