Update .env procedure to add edition of BACKUP_PATH and PLUGINS_CONFI…

…G_BASE_PATH

docs/INSTALL_DETAILED.md

@@ -124,6 +124,11 @@ The last lines provide you with usable values for your `.env`. You still can mod
     MYSQL_SUPER_USER=db-super-user
     MYSQL_SUPER_PASSWORD=db-secret
 
+You also have to modify the two following lines in `.env` file. If you don't do this, it won't work correctly.
+
+    BACKUP_PATH=data/backups
+    PLUGINS_CONFIG_BASE_PATH=data/plugins/
+
 Nearly done. You just need to finish bootstraping, either by simply calling `make bootstrap-mgmt` or going step by step from the section above.
 
 ## Tip to connect to C2C
@@ -140,4 +145,4 @@ That will allow you to connect and move to your `src` dir in two commands:
     www-data@mgmt-x-xxx:~$ vjahia2wp
     (venv) www-data@mgmt-x-xxx:/srv/your-env/jahia2wp/src$ vjahia2wp
 
-You can now jump to the [README usage](../README.md#usage) section.
+You can now jump to the [README usage](../README.md#usage) section.