feat: add Whitelabeling documentation and update enterprise index

- Introduced a new Whitelabeling documentation page detailing customization options for branding, appearance, metadata, and error pages.
- Updated the enterprise index to include a description of the Whitelabeling feature.

Author: Siumauricio

apps/docs/content/docs/core/enterprise/index.mdx

@@ -7,7 +7,7 @@ description: Enterprise features for SSO, whitelabeling, and audit logs
 ## What's included
 
 - **Single Sign-On (SSO)** — Integrate with Auth0, Keycloak, or other OIDC/SAML providers.
-{/* - **Whitelabeling** — Rebrand the UI with your logo, colors, and domain (self-hosted only) (). */}
+- **Whitelabeling** — Rebrand the UI with your logo, colors, and domain (self-hosted only).
 {/* - **Audit logs** — Track user actions and changes for compliance and security. */}
 
 More Enterprise features are on the way. [Contact us](https://dokploy.com/contact) if you want early access or have specific requirements.

apps/docs/content/docs/core/enterprise/whitelabeling.mdx

@@ -0,0 +1,76 @@
+---
+title: Whitelabeling
+description: Rebrand Dokploy with your application name, logos, colors, and custom links
+---
+
+Whitelabeling lets Enterprise users fully rebrand their Dokploy instance. You can customize the application name, logos, favicon, appearance, metadata, links, and error pages — all from **Settings → Whitelabel**.
+
+## Branding
+
+Customize the application name, logos, and favicon to match your brand identity.
+
+| Field | Description |
+| --- | --- |
+| **Application Name** | Replaces "Dokploy" across the entire interface. |
+| **Application Description** | Tagline shown on the login/onboarding pages. Defaults to the standard Dokploy description if empty. |
+| **Logo URL** | Main logo shown in the sidebar and header. Recommended size: 128×128px. |
+| **Login Page Logo URL** | Logo displayed on the login page. If empty, the main logo is used. |
+| **Favicon URL** | Browser tab icon. Supports `.ico`, `.png`, and `.svg` formats. |
+
+## Appearance
+
+Customize the look and feel of the application with custom CSS.
+
+The **Custom CSS** editor lets you inject custom CSS styles globally. Click **Load Default Styles** to get the base theme CSS variables as a starting point, then modify the values to match your brand.
+
+Example — changing background and foreground colors:
+
+```css
+/* Light Mode */
+:root {
+  --background: 0 0% 100%;
+  --foreground: 240 10% 3.9%;
+  --card: 0 0% 100%;
+  --card-foreground: 240 10% 3.9%;
+  --popover: 0 0% 100%;
+  --popover-foreground: 240 10% 3.9%;
+}
+```
+
+## Metadata & Links
+
+Customize the page title, footer text, and sidebar links.
+
+| Field | Description |
+| --- | --- |
+| **Page Title** | Browser tab title. Defaults to "Dokploy" if empty. |
+| **Footer Text** | Custom text displayed in the footer area. |
+| **Support URL** | Custom URL for the "Support" link in the sidebar. |
+| **Documentation URL** | Custom URL for the "Documentation" link in the sidebar. |
+
+## Error Pages
+
+Customize the error page messages shown to users.
+
+| Field | Description |
+| --- | --- |
+| **Error Page Title** | Title shown on error pages. |
+| **Error Page Description** | Description text shown on error pages. Defaults to "We're sorry, but an unexpected error occurred. Please try again later." |
+
+## Live Preview
+
+The whitelabel settings page includes a **Live Preview** section at the bottom. It shows a quick preview of how your branding changes will look — including the logo, application name, button styles, and footer text — before you save.
+
+## Actions
+
+- **Reset to Defaults** — Revert all whitelabel settings back to the default Dokploy branding.
+- **Save Changes** — Apply your customizations.
+
+## Best practices
+
+- Use high-resolution logos (e.g. 2×) for sharp display on retina screens. SVG format is recommended for perfect scaling.
+- Keep your custom CSS colors accessible with sufficient contrast for text and buttons.
+- Test the login page, dashboard, and key workflows after applying changes to ensure nothing is broken or hard to read.
+- Always preview your changes using the Live Preview section before saving.
+
+For help enabling or configuring whitelabeling, [contact us](https://dokploy.com/contact).