sql: delete is not deleting wtf

docker-compose.yml

@@ -5,10 +5,13 @@ version: '3.1'
 services:
 
   db:
-    image: mariadb
+    image: mariadb:latest
     restart: no
     environment:
+      MARIADB_DB: db
       MARIADB_ROOT_PASSWORD: 12345
+    volumes:
+        - mysql:/var/lib/mysql
     ports:
       - "3306:3306"
 
@@ -25,3 +28,6 @@ services:
     restart: no
     ports:
       - "6379:6379"
+
+volumes:
+  mysql: