minimal webfinger (#5373)

* initial webfinger stub

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* add webfinger to proxy, return current host

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* some cleanup

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* allow passing multiple rel params

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* introduce interfaces

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* parse oidc auth token

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* add templating, drop chain, use map of relation providers

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* fix ocis url yaml

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* fix typos

Co-authored-by: Dominik Schmidt <dschmidt@owncloud.com>

* switch to userinfo claims

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* readme cleanup

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* add TODO.md with ideas

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* replace subject on authenticated request responses

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* Apply suggestions from code review

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

* markdown lint

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* return a 401 when bearer token expired, some more docs

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* Apply suggestions from code review

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

* fix docs

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* clarify env var

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* extract handler func

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* use correct service in reflex.conf

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* test relations

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>

* Update services/webfinger/pkg/config/config.go

---------

Signed-off-by: Jörn Friedrich Dreyer <jfd@butonic.de>
Co-authored-by: Dominik Schmidt <dschmidt@owncloud.com>
Co-authored-by: Martin <github@diemattels.at>

docs/services/webfinger/_index.md

@@ -0,0 +1,18 @@
+---
+title: Webfinger
+date: 2023-02-03T00:00:00+00:00
+weight: 20
+geekdocRepo: https://github.com/owncloud/ocis
+geekdocEditPath: edit/master/docs/services/webfinger
+geekdocFilePath: _index.md
+geekdocCollapseSection: true
+---
+
+## Abstract
+
+This service provides endpoints a the /.well-known/webfinger implementation.
+
+## Table of Contents
+
+{{< toc-tree >}}
+

docs/services/wellknown/_index.md

@@ -0,0 +1,24 @@
+---
+title: Well-Known
+date: 2023-02-03T00:00:00+00:00
+weight: 20
+geekdocRepo: https://github.com/owncloud/ocis
+geekdocEditPath: edit/master/docs/services/well-known
+geekdocFilePath: _index.md
+geekdocCollapseSection: true
+---
+
+## Abstract
+
+This service provides endpoints on the /.well-known API
+
+## Table of Contents
+
+{{< toc-tree >}}
+
+
+## Webfinger
+
+## oCIS-configuration
+
+## Libregraph?