Convert services to singletons and use lazy loading to improve performance (#479)

* use singletons to reduce need to recreate the same objects

* unable to make the constructor private

* comment out debug printing to log file

* correct typo of treating self() as a var instead of a function

* utilise Localisation service as a singleton

* fix errent line that should have been commented

* remove phpinfo

* correct mistake in stock controller

* try storing app in apcu

* serialise inside the app closures

* get timings for db-changed-time

* get timings for db-changed-time

* store localisation service in apcu

* stor translations in apcu instead of localisation service (due to database connection)

* correct syntax error

* forgot to uncomment instance map

* correct indentation and variable out of scope

* more timings for app execution time

* try apc caching for views

* correct scope for Pot variable

* remove additional fopen

* correct timings for app build time

* correct timings for app object build time

* correct timings for app route build time

* get timings for routing timings

* get more in depth timings for routing loading

* fix more in depth timings for routing loading

* start investigating session auth middleware creation

* start investigating session auth middleware creation

* start investigating Login controller time

* start investigating Login controller time

* in depth look at Logincontroller timings

* comment out debug printing

* lazily obtain valus for page rendering

* correct syntax error

* correct scope of variable

* correct visibiity of methds inherited from BaseController

* missing use for Userfieldsservice

* lazy loading of open api spec

* lazy loading of users service

* lazy loading of batteries service

* lazy loading of services in controllers

* lazy loading of services in services

* correct mistake

* fix userservice

* fix userservice

* fix userfieldservice

* fix chores service

* fix calendar service

* remove Dockerfile used for development

* Remove docker compose file used for development

* Clean up app.php

* remove last diff

* Clean up base controller

* Clean up controllers

* lean up middleware

* Clean up and tuen all services into singletons

* remove debug from routes.php

* remove acpu from localisation

* Complete removal of acpu from localisation

* fixes for things broken

* More fixes following merge

* Fix for start up bug. Re factoring singleton code had brroken due to scope of clas var.

* fix bug where getUsersService is declared twice

* bug fixes following merge

* bug fixes following merge

* bug fixes following merge

* bug fixes following merge

* bug fixes following merge

* Fix all the not working things...

* Deleted off-topic files

* Deleted off-topic files

Co-authored-by: Bernd Bestel <bernd@berrnd.de>

routes.php

@@ -9,6 +9,7 @@ use Grocy\Middleware\ApiKeyAuthMiddleware;
 
 $app->group('', function(RouteCollectorProxy $group)
 {
+
 	// System routes
 	$group->get('/', '\Grocy\Controllers\SystemController:Root')->setName('root');
 	$group->get('/about', '\Grocy\Controllers\SystemController:About');
@@ -113,7 +114,7 @@ $app->group('', function(RouteCollectorProxy $group)
 		$group->get('/equipment', '\Grocy\Controllers\EquipmentController:Overview');
 		$group->get('/equipment/{equipmentId}', '\Grocy\Controllers\EquipmentController:EditForm');
 	}
-	
+
 	// Calendar routes
 	if (GROCY_FEATURE_FLAG_CALENDAR)
 	{