add test icon

docker-compose.yml

@@ -7,6 +7,7 @@ services:
     container_name: explainegy_postgres
     volumes:
       - explainegy_pg:/var/lib/postgresql/data
+      - ./docker_data/init.sql:/docker-entrypoint-initdb.d/init.sql
     environment:
       - POSTGRES_DB=postgres
       - POSTGRES_USER=postgres