moved hostname to separate file

docker-compose.yaml

@@ -2,9 +2,10 @@ services:
   keycloak:
     image: hub.anxietyprime.de/swa-jodel/keycloak:latest
     container_name: swa-keycloak
-    command: ["start-dev"]
+    command: ["start"]
     env_file:
       - ./.keycloak-env
+      - ./.hostname
     environment:
       KC_DB: postgres
       KC_DB_SCHEMA: public
@@ -45,6 +46,7 @@ services:
     container_name: swa-keycloak-db
     env_file:
       - ./.keycloak-env
+      - ./.hostname
     volumes:
       - ./keycloak-db/:/var/lib/postgresql/data
     expose: