Fix MongoDB class map hierarchy for inherited Content property

docker/docker-compose.yml

@@ -4,7 +4,7 @@ services:
     container_name: knot-db
     restart: always
     env_file:
-      - .env
+      - ../.env
     volumes:
       - postgres_data:/var/lib/postgresql/data
     ports:
@@ -17,7 +17,7 @@ services:
     container_name: knot-server
     restart: always
     env_file:
-      - .env
+      - ../.env
     depends_on:
       - db
       - minio
@@ -30,7 +30,7 @@ services:
     container_name: knot-minio
     restart: always
     env_file:
-      - .env
+      - ../.env
     ports:
       - "9000:9000"
       - "9001:9001"
@@ -55,7 +55,7 @@ services:
     ports:
       - "9090:80"
     env_file:
-      - .env
+      - ../.env
     depends_on:
       - server