Merge Phase G: Dashboard landing

# Conflicts:
#	frontend/build.ts
#	frontend/src/styles/global.css

cmd/server/main.go

@@ -58,6 +58,7 @@ func main() {
 			Calculator:     services.NewDeadlineCalculator(holidays),
 			Users:          users,
 			Fristenrechner: services.NewFristenrechnerService(rules, holidays),
+			Dashboard:      services.NewDashboardService(pool, users),
 		}
 		log.Println("Phase B services initialised")
 	} else {