* Added comment to show where maintenance window should be applied
* Add maintenance window schema
* Added userID to model
* Add maintenace window db operation methods
* add jsdocs
* Add remaining JSdocs
* Moved all methods to modules
* removed old mongoDB file
* Refactored endpoints to take query params, removed duplicate methods, updated routes, updated Client queries
* Added comment
* Add model differentiation
* Add sort order, fix minor bug, add validation for query params