README.md in lt-lcms-0.5.0 vs README.md in lt-lcms-0.6.0

@@ -32,9 +32,35 @@
 
 After checking out the repo, run `bin/setup` to install dependencies. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
 
 To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
 
+### Docker
+
+```shell
+docker buildx build --platform linux/arm64/v8,linux/amd64 -t learningtapestry/lt-lcms --push .
+```
+
+### Type checking
+
+Install existing collections:
+
+```shell
+rbs collection install
+```
+
+Validate installation
+
+```shell
+rbs validate
+```
+
+Check types
+
+```shell
+steep check
+```
+
 ## Contributing
 
 Bug reports and pull requests are welcome on GitHub at https://github.com/learningtapestry/lt-lcms.
 
 ## License