Composer:

composer update "typo3/cms-*" --with-all-dependencies

TYPO3 commands:

typo3 backend:user:create --username=xxxxxxx --password=xxxxxxxx
typo3 cache:flush
typo3 scheduler:run --task=1 -f

TYPO3 Links:

API A-Z: https://docs.typo3.org/m/typo3/reference-coreapi/main/en-us/ApiOverview/Index.html
Conditions https://docs.typo3.org/m/typo3/reference-typoscript/main/en-us/Conditions/Index.html
Query builder: https://docs.typo3.org/m/typo3/reference-coreapi/main/en-us/ApiOverview/Database/QueryBuilder/Index.html
TCEFORM: https://docs.typo3.org/m/typo3/reference-typoscript/main/en-us/PageTsconfig/TceForm.html
Event dispatcher (PSR-14 events): https://docs.typo3.org/m/typo3/reference-coreapi/main/en-us/ApiOverview/Events/EventDispatcher/Index.html
Frontend TypoScript: https://docs.typo3.org/m/typo3/reference-coreapi/main/en-us/ApiOverview/RequestLifeCycle/RequestAttributes/FrontendTyposcript.html
Working with files, folders and file references : https://docs.typo3.org/m/typo3/reference-coreapi/main/en-us/ApiOverview/Fal/UsingFal/ExamplesFileFolder.html

TYPO3 Changelog:

https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/10.4/Deprecation-88740-ExtFeloginPibasePlugin.html
https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/10.4/Deprecation-90803-DeprecationOfObjectManagergetInExtbaseContext.html
https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/11.4/Deprecation-94619-ExtbaseObjectManager.html
https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/12.0/Deprecation-97126-TCEformsRemovedInFlexForm.html
https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/12.0/Feature-98375-PSR-14EventsInPageModule.html
https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/12.0/Breaking-97816-TypoScriptSyntaxChanges.html
https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/12.0/Deprecation-96903-DeprecateOldModuleTemplateAPI.html
https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/12.0/Feature-96730-SimplifiedExtbackendModuleTemplateAPI.html
https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/12.0/Deprecation-96641-LinkRelatedFunctionalityInContentObjectRenderer.html
https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/12.0/Feature-97922-ImprovePerformanceAndUsabilityWhileEditingSys_filemounts.html
https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/12.3/Deprecation-100053-GeneralUtility_GP.html
https://docs.typo3.org/m/typo3/reference-coreapi/12.4/en-us/ExtensionArchitecture/FileStructure/ExtTables.html
https://docs.typo3.org/m/typo3/reference-coreapi/12.4/en-us/ApiOverview/Backend/BackendModules/ModuleConfiguration/Index.html#confval-backend-module-iconidentifier
https://docs.typo3.org/m/typo3/reference-coreapi/12.4/en-us/ApiOverview/Backend/BackendModules/SudoMode.html#backend-module-sudo-modules
https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/13.0/Breaking-100963-DeprecatedFunctionalityRemoved.html
https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/13.2/Deprecation-103752-ObsoleteGLOBALSTYPO3_CONF_VARSFEaddRootLineFields.html
https://docs.typo3.org/c/typo3/cms-core/main/en-us/Changelog/13.4/Deprecation-105171-INCLUDE_TYPOSCRIPTTypoScriptSyntax.html
https://docs.typo3.org/m/typo3/reference-coreapi/main/en-us/ApiOverview/Deprecation/Index.html
https://docs.typo3.org/m/typo3/reference-exceptions/main/en-us/Exceptions/1666513645.html