Add releasing instructions to README

README.md

@@ -15,3 +15,17 @@ WIP. Will be: a lightweight and nimble HTML templating engine, designed for comp
 Currently under the AGPL 3 or later, but this is relatively likely to be changed at a later date.
 
 See `LICENCE.txt`.
+
+## Development
+
+### Releasing
+
+This is the command used to cut a release:
+
+```shell-commands
+cargo ws publish patch --all --force '*'
+```
+
+* `patch` could be `major` or `minor` instead.
+* `--force '*'` means all packages are bumped, even though they have no changes. This keeps the version numbers in sync.
+* `--all` means `demo_hornbeam_project` will be bumped even though it is not published.