Added magentodata volume for app/code/Magento support

compose/docker-compose.yml

@@ -22,6 +22,7 @@ services:
       - ~/.ssh/id_rsa:/var/www/.ssh/id_rsa:cached
       - ~/.ssh/known_hosts:/var/www/.ssh/known_hosts:cached
       - appdata:/var/www/html
+      - magentodata:/var/www/html/app/code/Magento
       - sockdata:/sock
       - ssldata:/etc/nginx/certs
 
@@ -94,6 +95,7 @@ services:
 volumes:
   appdata:
   dbdata:
+  magentodata:
   rabbitmqdata:
   sockdata:
   ssldata: