fix: Running in Docker

conduit-example.toml

@@ -22,6 +22,7 @@ database_backend = "rocksdb"
 # The port Conduit will be running on. You need to set up a reverse proxy in
 # your web server (e.g. apache or nginx), so all requests to /_matrix on port
 # 443 and 8448 will be forwarded to the Conduit instance running on this port
+# Docker users: Don't change this, you'll need to map an external port to this.
 port = 6167
 
 # Max size for uploads