docs: add KRATOS_ADMIN_URL env variable and fix HYDRA_ADMIN_URL mistake

README.md

@@ -29,13 +29,13 @@ Ory Identities requires the following variables to be set:
   `kratos-public.svc.cluster.local`).
 - `KRATOS_BROWSER_URL` (optional) The browser accessible URL where ORY Kratos's
   public API is located, only needed if it differs from `KRATOS_PUBLIC_URL`
+- `KRATOS_ADMIN_URL` (optional) The URL where Ory Kratos' Admin API is located at (e.g. `http://kratos:4434`).
 
 Ory OAuth2 requires more setup to get CSRF cookies on the `/consent` endpoint.
 
 - `ORY_SDK_URL` or `HYDRA_ADMIN_URL` (optional): The URL where Ory Hydra's
-  Public API is located at. If this app and Ory Hydra are running in the same
-  private network, this should be the private network address (e.g.
-  `hydra-admin.svc.cluster.local`)
+  Admin API is located at. If this app and Ory Hydra are running in the same
+  private network, this should be the private network address (e.g. `hydra-admin.svc.cluster.local`)
 - `COOKIE_SECRET` (required): Required for signing cookies. Must be a string
   with at least 8 alphanumerical characters.
 - `CSRF_COOKIE_NAME` (required): Change the cookie name to match your domain