See release notes here.
We deprecated the older lower case config style and moved on to camel case style. Please have a look at the current config.json.example
and check the warnings on startup.
Notice: This is not a breaking change right now but will be in the future
We no longer use LZString to compress socket.io
data and DB data after version 0.5.0.
Run this migration tool if you're upgrading from the old version.
Migration-to-0.5.0 migration tool
We've dropped MongoDB after version 0.4.0. Here is a migration tool for you to migrate the old DB data to the new one. This tool is also used for official service.
Migration-to-0.4.0 migration tool
CodiMD
Docs