docs: more tips from tracking configs

README.md

@@ -31,8 +31,20 @@
 
 ## Tips & Tricks
 
+### Seeing what changed in `homeserver.yaml` between versions
+
+Change the version range to suit your needs.
+
+```
+git clone https://github.com/matrix-org/synapse
+cd synapse/docs
+git log --follow -p v1.48.0..v1.51.0 sample_config.yaml
+```
+
 ### Generating a new `homeserver.yaml`
 
+The default is also available to see [here](https://matrix-org.github.io/synapse/latest/usage/configuration/homeserver_sample_config.html).
+
 ```
 docker run -it \
   --entrypoint="" \