it works now

compose.yml

@@ -3,6 +3,8 @@ services:
     image: surrealdb/surrealdb:latest-dev
     ports:
     - 8000:8000
+    volumes:
+      - ./.surrealdb/:/mydata
     command:
       - start
       - --log
@@ -11,3 +13,4 @@ services:
       - root
       - --pass
       - root
+      - rocksdb:/mydata/database.db