diff --git a/docker/templates/db_data_readme.md b/docker/templates/db_data_readme.md
new file mode 100644
index 0000000000000000000000000000000000000000..1c357dbf700b72678c14be0b2e9b1e9d019ccc5e
--- /dev/null
+++ b/docker/templates/db_data_readme.md
@@ -0,0 +1,5 @@
+# TARGET: docker/containers/db-server/var_tmp_db-data/readme.txt
+
+# Info
+
+content of `docker/containers/db_server/var_tmp_db-data/` will be visible in the database container as `/var/tmp/db-data/`. It is a helper to transfer/ import sqldumps.
diff --git a/docker/templates/docker-compose.yml b/docker/templates/docker-compose.yml
index 49dada24acc8e877b3ead1445cd4429a0f01fbb8..3dd092405c63bb49e31295430ea9f1aa4889d302 100644
--- a/docker/templates/docker-compose.yml
+++ b/docker/templates/docker-compose.yml
@@ -62,8 +62,9 @@ services:
       MYSQL_PASSWORD: '${MYSQL_PASS}'
       MYSQL_DATABASE: '${MYSQL_DB}'
     volumes:
-      # - ./containers/db-server/db_data:/var/lib/mysql
       - ./containers/db-server/mariadb/my.cnf:/etc/mysql/conf.d/my.cnf
+      - ./containers/db-server/mariadb/dot_my.cnf:/root/.my.cnf
+      - ./containers/db-server/var_tmp_db-data/:/var/tmp/db-data
     healthcheck:
       test: mysqladmin ping -h 127.0.0.1 -u root --password=$$MYSQL_ROOT_PASSWORD
       interval: 5s