Because:
- Locally the sync service wasn't running.
- We couldn't test sync flows against a local sync server
- There's a new version of the sync server that uses rust
This Commit:
- Sets up a dockerfile for syncstorage-rs that is tailored to fxa's local stack
- Updates pm2 sync job to run this docker container and initialize its databases.
- Updates firefox config/profile to point at this service
- Starts firefox up with the FIREFOX_DEBUGGER=true env.
- Useful for debugging sync
- Useful for debugging FxA web channel messages
