website/docs: add docs for automated installs

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

website/docs/installation/automated-install.md

@@ -0,0 +1,17 @@
+---
+title: Automated install
+---
+
+To install authentik automatically (skipping the Out-of-box experience), you can use the following environment variables:
+
+### `AK_ADMIN_PASS`
+
+Configure the default password for the `akadmin` user. Only read on the first startup. Can be used for any flow executor.
+
+### `AK_ADMIN_TOKEN`
+
+:::note
+This option has been added in 2021.8
+:::
+
+Create a token for the default `akadmin` user. Only read on the first startup. The string you specify for this variable is the token key you can use to authenticate yourself to the API.

website/sidebars.js

@@ -18,6 +18,7 @@ module.exports = {
                 "installation/beta",
                 "installation/configuration",
                 "installation/reverse-proxy",
+                "installation/automated-install",
             ],
         },
         {