Fix writefreely mariadb datadir and set user_invites to admin.

roles/docker/tasks/services/writefreely.yml

@@ -53,7 +53,7 @@
           image: "mariadb:{{ services.writefreely.mariadb_version }}"
 
           volumes:
-            - "{{ services.writefreely.volume_folder }}/mariadb_data:/var/lib/mysql/data"
+            - "{{ services.writefreely.volume_folder }}/mariadb_data:/var/lib/mysql"
 
           networks:
             - "internal_writefreely"

roles/docker/templates/writefreely/config.ini.j2

@@ -38,7 +38,7 @@ monetization          = false
 notes_only            = false
 private               = false
 local_timeline        = true
-user_invites          = 
+user_invites          = admin
 default_visibility    = 
 update_checks         = false
 disable_password_auth = false