fix(services): create a dedicated mysql data volume

docker-compose-services.yaml

@@ -24,6 +24,11 b' volumes:'
     labels:
       "keep": 1
 
+  # volume for MySQL Data
+  mysql_data:
+    labels:
+      "keep": 1
+
   # volume for rhodecode elasticsearch
   es_data:
     labels:
@@ -289,8 +294,10 b' services:'
 
       volumes:
         - $PWD/config/database/mysql_customized.conf:/etc/mysql/conf.d/config-file.cnf:ro
+        # db dumps reverse mount
+        - $PWD/.custom/db_dump:/var/rc-data-dump
         # save the mysql_data volume
-        - $PWD/mysql_dir:/var/lib/mysql
+        - mysql_data:/var/lib/mysql
 
       profiles:
         ["mysql"]