enable container init system

docker-compose.yml

@@ -2,6 +2,7 @@ services:
 
   db:
     image: postgres:16-alpine
+    init: true
     environment:
       POSTGRES_DB: "gaehsnitzdb"
       POSTGRES_USER: "gaehsnitzuser"
@@ -14,6 +15,7 @@ services:
   web:
     build:
       context: .
+    init: true
     environment:
       DB_HOST: "db"
       DB_PORT: "5432"