add persistent_data

razer-sql/docker-compose.yml

@@ -11,6 +11,8 @@ services:
       - "3306:3306"
     environment:
       MYSQL_ROOT_PASSWORD: root
+    volumes:
+        - ./persistent_data:/var/lib/mysql
 
   #adminer:
   #  image: adminer

razer-sql/persistent_data/README.md

@@ -0,0 +1,13 @@
+# Persistent storage
+
+* Sql db data store here to avoid data loss if container shutdown
+
+```yml
+services:
+
+  db:
+    image: mysql
+    ...
+    volumes:
+        - ./persistent_data:/var/lib/mysql
+```