[full-ci] enhancement: allow ocis to provide custom web applications (#8523)

* enhancement: allow ocis to provide custom web applications

* enhancement: add an option to disable web apps

* test: add default logger tests

* test: add app loading tests

* test: add asset server tests

* enhancement: make use of dedicated app conf file and app asset paths

* enhancement: adjust asset locations and deprecate WEB_ASSET_PATH

* enhancement: get rid of default logger and use the service level logger instead

* Apply suggestions from code review

Co-authored-by: Benedikt Kulmann <benedikt@kulmann.biz>
Co-authored-by: kobergj <juliankoberg@googlemail.com>

* enhancement: use basename as app id

* Apply suggestions from code review

Co-authored-by: Martin <github@diemattels.at>

* enhancement: use afero as fs abstraction

* enhancement: simplify logo upload

* enhancement: make use of introductionVersion field annotations

---------

Co-authored-by: Benedikt Kulmann <benedikt@kulmann.biz>
Co-authored-by: kobergj <juliankoberg@googlemail.com>
Co-authored-by: Martin <github@diemattels.at>

services/web/pkg/config/defaults/defaultconfig.go

@@ -80,7 +80,8 @@ func DefaultConfig() *config.Config {
 			Name: "web",
 		},
 		Asset: config.Asset{
-			Path: filepath.Join(defaults.BaseDataPath(), "web/assets"),
+			CorePath: filepath.Join(defaults.BaseDataPath(), "web/assets/core"),
+			AppsPath: filepath.Join(defaults.BaseDataPath(), "web/assets/apps"),
 		},
 		GatewayAddress: "com.owncloud.api.gateway",
 		Web: config.Web{