docs(oidc): add zipline (#8875)

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+---
+title: "Zipline"
+description: "Integrating Zipline with the Authelia OpenID Connect 1.0 Provider."
+summary: ""
+date: 2025-03-04T12:18:02+10:00
+draft: false
+images: []
+weight: 620
+toc: true
+support:
+  level: community
+  versions: true
+  integration: true
+seo:
+  title: "" # custom title (optional)
+  description: "" # custom description (recommended)
+  canonical: "" # custom canonical URL (optional)
+  noindex: false # false (default) or true
+---
+
+## Tested Versions
+
+* [Authelia]
+  * [v4.38.0](https://github.com/authelia/authelia/releases/tag/v4.38.0)
+* [Zipline]
+  * [4.0.0](https://github.com/diced/zipline/releases/tag/v4.0.0)
+
+{{% oidc-common %}}
+
+### Assumptions
+
+This example makes the following assumptions:
+
+* __Application Root URL:__ `https://zipline.{{< sitevar name="domain" nojs="example.com" >}}/`
+* __Authelia Root URL:__ `https://{{< sitevar name="subdomain-authelia" nojs="auth" >}}.{{< sitevar name="domain" nojs="example.com" >}}/`
+* __Client ID:__ `zipline`
+* __Client Secret:__ `insecure_secret`
+
+Some of the values presented in this guide can automatically be replaced with documentation variables.
+
+{{< sitevar-preferences >}}
+
+## Configuration
+
+### Authelia
+
+The following YAML configuration is an example __Authelia__ [client configuration] for use with [Zipline] which will
+operate with the application example:
+
+```yaml {title="configuration.yml"}
+identity_providers:
+  oidc:
+    ## The other portions of the mandatory OpenID Connect 1.0 configuration go here.
+    ## See: https://www.authelia.com/c/oidc
+    clients:
+      - client_id: 'zipline'
+        client_name: 'Zipline'
+        client_secret: '$pbkdf2-sha512$310000$c8p78n7pUMln0jzvd4aK4Q$JNRBzwAo0ek5qKn50cFzzvE9RXV88h1wJn5KGiHrD0YKtZaR/nCb2CJPOsKaPK0hjf.9yHxzQGZziziccp6Yng'  # The digest of 'insecure_secret'.
+        public: false
+        redirect_uris:
+          - 'https://zipline.{{< sitevar name="domain" nojs="example.com" >}}/api/auth/oauth/oidc'
+        scopes:
+          - 'openid'
+          - 'email'
+          - 'profile'
+          - offline_access
+        response_types: 'code'
+        token_endpoint_auth_method: 'client_secret_post'
+```
+
+### Application
+
+To configure [Zipline] to utilize Authelia as an [OpenID Connect 1.0] Provider:
+
+1. Go to Server Settings
+2. Activate the **OAuth Registration** feature toggle
+2. Configure:
+   1. OIDC Client ID: `ziplinea`
+   2. OIDC Client Secret: `insecure_secret`
+   3. OIDC Authorize URL: `https://{{< sitevar name="subdomain-authelia" nojs="auth" >}}.{{< sitevar name="domain" nojs="example.com" >}}/api/oidc/authorization`
+   4. OIDC Token URL: `https://{{< sitevar name="subdomain-authelia" nojs="auth" >}}.{{< sitevar name="domain" nojs="example.com" >}}/api/oidc/token`
+   5. OIDC Userinfo URL: `https://{{< sitevar name="subdomain-authelia" nojs="auth" >}}.{{< sitevar name="domain" nojs="example.com" >}}/api/oidc/userinfo`
+   6. OIDC Redirect URL can be left blank, but the default Zipline URL is HTTP, if you didn't activate **Return HTTPS URLs** in the Core settings, this impacts the OIDC Redirect URL
+3. Click Save
+
+{{< figure src="zipline.png" alt="Zipline configuration" width="300" >}}
+
+Take a look at the [See Also](#see-also) section for the cheatsheets corresponding to the sections above for their
+descriptions.
+
+## See Also
+
+- [Zipline]:
+  - [OIDC documentation](https://zipline.diced.sh/docs/guides/oauth/oidc)
+
+[Authelia]: https://www.authelia.com
+[Zipline]: https://zipline.diced.sh/
+[OpenID Connect 1.0]: ../../openid-connect/introduction.md
+[client configuration]: ../../../configuration/identity-providers/openid-connect/clients.md
diff --git a/docs/content/integration/openid-connect/zipline/zipline.png b/docs/content/integration/openid-connect/zipline/zipline.png
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