chore: Add keycloakify to readme (#1192)

* add keycloakify to readme

* Update README.md

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Co-authored-by: Cornelius Roemer <cornelius.roemer@gmail.com>

README.md

@@ -13,7 +13,7 @@ Additional documentation for development is available in each folder's README. T
 - Sequence and metadata processing pipeline is in [`preprocessing`](/preprocessing) folder, see [`preprocessing/specification.md`](/preprocessing/specification.md)
 - Deployment code is in `kubernetes`, see [`kubernetes/README.md`](/kubernetes/README.md).
   Check this for local development setup instructions.
-- Authorization is performed by our own keycloak instance. see config in [`keycloak-image`](kubernetes/loculus/templates/keycloak-deployment.yaml) and [`realm-config`](kubernetes/loculus/templates/keycloak-config-map.yaml)
+- Authorization is performed by our own keycloak instance. See config in [`keycloak-image`](kubernetes/loculus/templates/keycloak-deployment.yaml) and [`realm-config`](kubernetes/loculus/templates/keycloak-config-map.yaml). The keycloak login theme is built with a custom [keycloakify](keycloak/keycloakify) build.
 
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