docs: added example configs for oidc for specific services (portainer, proxmox) (#2831)

Co-authored-by: Clément Michaud <clement.michaud34@gmail.com>

docs/community/oidc-integrations.md

@@ -2,7 +2,9 @@
 layout: default
 title: Community-Tested OIDC Integrations
 parent: Community
-nav_order: 4
+nav_order: 5
+has_children: true
+has_toc: false
 ---
 
 # OIDC Integrations

docs/community/oidc-integrations/portainer.md

@@ -0,0 +1,44 @@
+---
+layout: default
+title: Portainer
+parent: Community-Tested OIDC Integrations
+grand_parent: Community
+nav_order: 1
+---
+
+# OIDC Integrations: Portainer
+
+{{ page.path }}
+
+**Note** these setting have been tested with authelia `v4.33.2` and Portainer-CE `2.11.0`
+
+## Authelia config
+
+The specific client config for portainer.
+
+```yaml
+identity_providers:
+  oidc:
+    clients:
+      - id: portainer_client_id
+        description: Some description you want to shown on the Authelia consent page
+        secret: some secret string which should also be entered in the portainer config
+        public: false
+        authorization_policy: two_factor
+        audience: []
+        scopes:
+          - openid
+        redirect_uris:
+          - https://portainer.example.com
+        userinfo_signing_algorithm: none
+```
+
+## Portainer config
+
+To setup Authelia as SSO provider in portainer go to **Settings > Authentication** and select **Authentication method** OAuth and **Provider** Custom and make sure automatic user provision is turned so users get automatically created.
+
+**Note** make sure that Redirect URL matches exacty the redirect_uris in authelia config. Also us `preferred_username` as the User identifier which makes sure the portianer user and authelia user have the same username.
+
+<p align="center">
+  <a href="../../images/portainer.gif" target="_blank"><img src="../../images/portainer.gif" width="736"></a>
+</p>

docs/community/oidc-integrations/proxmox.md

@@ -0,0 +1,42 @@
+---
+layout: default
+title: Proxmox
+parent: Community-Tested OIDC Integrations
+grand_parent: Community
+nav_order: 2
+---
+
+# OIDC Integrations: Proxmox
+
+{{ page.path }}
+
+## Authelia config
+
+**Note** these setting have been tested with authelia `v4.33.2` and Proxmox `7.1-10`
+
+The specific client config for proxmox.
+
+```yaml
+identity_providers:
+  oidc:
+    clients:
+      - id: some id you want to use on the client
+        description: Some description you want to shown on the Authelia consent page
+        secret: some secret string which should also be entered in the proxmox config
+        public: false
+        authorization_policy: two_factor
+        audience: []
+        scopes:
+          - openid
+        redirect_uris:
+          - https://proxmox.example.com
+        userinfo_signing_algorithm: none
+```
+
+## Proxmox config
+
+Under Datacenter go to **Persmission > Realms** and add the an OpenID Connect Server
+
+<p align="center">
+  <a href="../../images/portainer.gif" target="_blank"><img src="../../images/proxmox.gif" width="736"></a>
+</p>