Fix dataChange2 events not reaching Matrix bridge in production-like setup

Fix dataChange2 events not reaching Matrix bridge in production-like setup

Start the matrix-bridge in the API process so the dataChange2 events that fire in the API process make their way over to the matrix-bridge.

Before the matrix-bridge was just running in the web process, which didn't see any dataChange2 events because the API is served by the separate process where all of the action happens.

---

Technically, we only need matrix-bridge/lib/gitter-bridge running in the web.js process but the matrix-appservice-bridge doesn't allow us to use the API calls without running bridge.run.

Dev notes

Debugging on beta why Gitter messages aren't creating Matrix rooms:

$ ssh beta-webapp-01.beta.gitter

$ systemctl stop gitter-web-1
$ systemctl start gitter-web-1
# Follow the latest log stdout for the process
$ journalctl -u gitter-web-1 -f

$ systemctl stop gitter-api-1
$ systemctl start gitter-api-1
# Follow the latest log stdout for the process
$ journalctl -u gitter-api-1 -f