add steps for configuring netbird with zitadel idp manager

docs/integrations/identity-providers/self-hosted/available-integrations.md

@@ -13,3 +13,4 @@ NetBird supports generic OpenID (OIDC) protocol allowing for the integration wit
 List of available guides:
 - [Auth0](/integrations/identity-providers/self-hosted/using-netbird-with-auth0) (managed service)
 - [Keycloak](/integrations/identity-providers/self-hosted/using-netbird-with-keycloak)
+- [Zitadel](/integrations/identity-providers/self-hosted/using-netbird-with-zitadel)

docs/integrations/identity-providers/self-hosted/zitadel.md

@@ -0,0 +1,162 @@
+---
+id: using-netbird-with-zitadel
+title: Using NetBird with Zitadel
+sidebar_position: 5
+tags:
+- integrations
+- idp
+- zitadel
+- oidc
+- how-to
+---
+
+This guide is a part of the [NetBird Self-hosting Guide](/getting-started/self-hosting) and explains how to integrate 
+**self-hosted** NetBird with [Zitadel](https://zitadel.com).
+
+:::tip managed idp
+If you prefer not to self-host an Identity and Access Management solution, then you could use a managed alternative like
+[Auth0](/integrations/identity-providers/self-hosted/using-netbird-with-auth0).
+:::
+
+### 1. Create and configure Zitadel application
+In this step, we will create and configure Netbird application in zitadel.
+
+Create new zitadel project
+- Navigate to zitadel console
+- Click `Projects` at the top menu, then click `Create New Project` to create a new project
+- Fill in the form with the following values and click `Continue`
+  - Name: `NETBIRD`
+
+![](/img/integrations/identity-providers/self-hosted/zitadel-new-project.png)
+
+Create new zitadel application
+- Click `Projects` in the top menu and select `NETBIRD` project from the list
+- Click `New` in `APPLICATIONS` section to create a new application
+- Fill in the form with the following values and click `Continue`
+    - Name: `netbird`
+    - TYPE OF APPLICATION: `User Agent`
+
+![](/img/integrations/identity-providers/self-hosted/zitadel-new-application.png)
+
+- Fill in the form with the following values and click `Continue`
+    - Authentication Method: `PKCE`
+
+![](/img/integrations/identity-providers/self-hosted/zitadel-new-application-auth.png)
+
+- Fill in the form with the following values and click `Continue`
+    - Redirect URIs: `https://<domain>/auth` and click `+`
+    - Post Logout URIs: `https://<domain>/silent-auth` and click `+`
+
+![](/img/integrations/identity-providers/self-hosted/zitadel-new-application-uri.png)
+
+- Verify applications details and Click `Create` and then click `Close`
+
+![](/img/integrations/identity-providers/self-hosted/zitadel-new-application-overview.png)
+
+- Copy `Client ID` will be used later in the `setup.env`
+
+### Step 2: Application Token Configuration
+
+To configure `netbird` application token you need to:
+
+- Click `Projects` in the top menu and select `NETBIRD` project from the list
+- Select `netbird` application from `APPLICATIONS` section
+- Click `Token Settings` in the left menu
+- Fill in the form with the following values:
+  - Auth Token Type: `JWT`
+  - Check `Add user roles to the access token` checkbox
+- Click `Save`
+
+![](/img/integrations/identity-providers/self-hosted/zitadel-token-settings.png)
+
+### Step 3: Application Redirect Configuration
+
+:::caution
+This step is intended for setup running in development mode with no SSL
+:::
+
+To configure `netbird` application redirect you need to:
+
+- Click `Projects` in the top menu and select `NETBIRD` project from the list
+- Select `netbird` application from `APPLICATIONS` section
+- Click `Redirect Settings` in the left menu
+- Fill in the form with the following values:
+  - Toggle `Development Mode`
+- Click `Save`
+
+![](/img/integrations/identity-providers/self-hosted/zitadel-redirect-settings.png)
+
+### Step 4: Create a Service User
+
+In this step we will create a `netbird` service user.
+
+- Click `Users` in the top menu
+- Select `Service Users` tab
+- Click `New`
+- Fill in the form with the following values:
+  - User Name: `netbird`
+  - Name: `netbird`
+  - Description: `Netbird Service User`
+  - Access Token Type: `JWT`
+- Click `Create`
+
+![](/img/integrations/identity-providers/self-hosted/zitadel-create-user.png)
+
+In this step we will generate `ClientSecret` for the `netbird` service user.
+
+- Click `Actions` in the top right corner and click `Generate Client Secret`
+- Copy `ClientSecret` from the dialog will be used later to set `ClientSecret` in the `management.json`
+
+![](/img/integrations/identity-providers/self-hosted/zitadel-service-user-secret.png)
+
+### Step 4: Grant manage-users role to netbird service user
+
+In this step we will grant `Org User Manager` role to `netbird` service user.
+
+- Click `Organization` in the top menu
+- Click `+` in the top right corner
+- Search for `netbird` service user
+- Check `Org User Manager` checkbox
+- Click `Add`
+
+![](/img/integrations/identity-providers/self-hosted/zitadel-service-account-role.png)
+
+
+Your authority OIDC configuration will be available under:
+```
+https://<YOUR-ZITADEL-HOST-AND-PORT>/.well-known/openid-configuration
+```
+:::caution
+Double-check if the endpoint returns a JSON response by calling it from your browser.
+:::
+
+- Set properties in the `setup.env` file:
+```json
+NETBIRD_AUTH_OIDC_CONFIGURATION_ENDPOINT="https://<YOUR-ZITADEL-HOST-AND-PORT>/.well-known/openid-configuration"
+NETBIRD_USE_AUTH0=false
+NETBIRD_AUTH_CLIENT_ID="<Client ID>"
+NETBIRD_AUTH_AUDIENCE="<Client ID>"
+NETBIRD_AUTH_DEVICE_AUTH_CLIENT_ID="<Client ID>"
+NETBIRD_AUTH_REDIRECT_URI="/auth"
+NETBIRD_AUTH_SILENT_REDIRECT_URI="/silent-auth"
+```
+
+- You can now continue with the [NetBird Self-hosting Guide](/getting-started/self-hosting#step-3-configure-identity-provider).
+
+- Set property `IdpManagerConfig` in the `management.json` file with:
+  :::caution
+  The file management.json is created automatically. Please refer [here](/getting-started/self-hosting#step-5-run-configuration-script) for more information.
+  :::
+
+  ```json
+  {
+    "ManagerType":  "zitadel",
+    "ZitadelClientCredentials": {
+        "ClientID": "netbird",
+        "ClientSecret": "<CLIENT SECRET>",
+        "GrantType": "client_credentials",
+        "TokenEndpoint": "https://<YOUR-ZITADEL-HOST-AND-PORT>/oauth/v2/token",
+        "ManagementEndpoint": "https://<YOUR-ZITADEL-HOST-AND-PORT>/management/v1"
+    }
+  }
+  ```