Actually, this was correct, fix path for DB

ansible/pre-deploy.yml

@@ -84,7 +84,7 @@
           - /var/lib/gitea:/data
           - /etc/timezone:/etc/timezone:ro
           - /etc/localtime:/etc/localtime:ro
-          - /var/lib/dokku/services/mariadb/gitea/data:/var/lib/mysql
+          - /var/lib/dokku/services/mariadb/gitea:/var/lib/mysql
 
     - name: Store gitea git user uid/guid
       set_fact: