With OpenSyncedLists you can easily write, sort and sync your lists (shopping lists, Todo lists, ..).
The lists are already synced to your own server instance.
You can download and install the apk from the repo:
"Android_Client/build/OpenSyncedLists.apk"
The express server is easy to setup inside docker container. Move to "Express_Server" and just run: ''' sudo docker-compose up -d '''