migration-to-0.4.0

This is the migration tool for HackMD to upgrade to version 0.4.0.
Because we've dropped MongoDB from version 0.4.0.
Use this tool if you were running a old version HackMD server.
And have some old data need to transfer to new DB schemas.

Get started

1. Install node (at least 4.2), and run npm install.
2. You need to specify some settings in the file config.js.
   • old_db_mongodb: old MongoDB connection string.
   • old_db_postgresql: old PostgreSQL connection string.
   • new_db: new DB connect settings, see more here
3. run the app.js as you like (in most case node app.js is enough)
4. Wait for migration, will take more time if you have large amount of data.
5. Complete!