doc: Okta SSO Configuration Doc (#3876)

* Okta SSO Configuration Doc

* Image Detail Masked

* Video Replaced + Details Masked

* Added external reference doc + minor changes

docs/SUMMARY.md

@@ -25,6 +25,7 @@
   * [Chart Repositories](user-guide/global-configurations/chart-repo.md)
   * [Custom charts](user-guide/global-configurations/custom-charts.md)
   * [SSO Login Services](user-guide/global-configurations/sso-login.md)
+    * [Example - Okta SSO](user-guide/global-configurations/okta.md)
   * [Authorization](user-guide/global-configurations/authorization/README.md)
     * [User Permissions](user-guide/global-configurations/authorization/user-access.md)
     * [Permission Groups](user-guide/global-configurations/authorization/permission-groups.md)

docs/user-guide/global-configurations/okta.md

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+# Example - Okta SSO
+
+## Prerequisites
+
+A verified account on [Okta](https://www.okta.com/). Okta activates your account only if email verification is successful.
+
+Here's a reference guide to set up your Okta org and application: [Link](https://developer.okta.com/docs/guides/oie-embedded-common-org-setup/go/main/)
+
+## Tutorial
+
+{% embed url="https://www.youtube.com/watch?v=i-7IWkg6Ipk" caption="Okta App Setup" %}
+
+## Steps on Okta Admin Console
+
+Once your Okta org is set up, create an app integration on Okta to get a Client ID and Client Secret.
+
+1. In the Admin Console, go to **Applications** → **Applications**.
+
+2. Click **Create App Integration**.
+
+3. Select **OIDC - OpenID Connect** as the **Sign-in method**.
+
+{% hint style="info" %}
+OIDC stands for OpenID Connect. [Click here](https://www.okta.com/openid-connect/) to read more.
+{% endhint %}
+
+4. Select **Web** as the application type and click **Next**.
+
+5. On the **App Integration** page:
+    * Give a name to your application.
+    * Select the **Interaction Code** and **Refresh Token** checkbox.
+    * Now go to Devtron's Global Configurations → SSO Login Services → OIDC.
+    * Copy the redirect URI given in the helper text (might look like: https://xxx.xxx.xxx/xxx/callback).
+    * Return to the Okta screen, and remove the prefilled value in **Sign-in redirect URIs**.
+    * Paste the copied URI in **Sign-in redirect URIs**.
+    * Click **Save**.
+
+6. On the **General** tab:
+    * Note the **Client ID** value.
+    * Click the **Edit** option.
+    * In Client Authentication, choose **Client Secret**.
+    * Click **Save**.
+    * Click **Generate new secret**.
+    * Note the **Client Secret** value.
+
+
+## Steps on Devtron
+
+1. Go to the Global Configurations → SSO Login Services → OIDC.
+2. In the **URL** field, enter the Devtron application URL (a valid https link) where it is hosted.
+3. Under `Configuration` tab, locate the config object, and provide the `clientID` and `clientSecret` of the app integration you created on Okta.
+4. Add a key `insecureSkipEmailVerified: true`. Note that this key is only required for Okta SSO. For other types of OIDC SSO, refer [OIDC supported configurations](https://dexidp.io/docs/connectors/oidc/).
+5. Provide `issuer` value as `https://${yourOktaDomain}/oauth2/default`. Replace `${yourOktaDomain}` with your domain on Okta as shown in the video.
+6. For providing `redirectURI` or `callbackURI` registered with the SSO provider, you can either select `Configuration` or `Sample Script`. Note that the redirect URI is already given in the helper text (as seen in the previous section).
+7. Click **Save** to create and activate Okta SSO login.
+
+Now your users will be able to log in to Devtron using the Okta authentication method. Note that existing signed-in users will be logged out and they have to log in again using their OIDC account.
+
+## Sample Configuration
+
+![](https://devtron-public-asset.s3.us-east-2.amazonaws.com/images/global-configurations/sso-login-service/sample-config-okta.jpg)
+
+