Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -14,3 +14,22 @@ inclusion.
 * Try to stick to the [Conventions for Tools in the Image Community](https://github.com/elixir-europe/biohackathon-projects-2023/blob/main/16/conventions.md) and the [IUC standards](http://galaxy-iuc-standards.readthedocs.org/en/latest/) whenever you can
 * Make sure you have added the necessary tests for your changes and they pass.
 * Open a [pull request](https://help.github.com/articles/using-pull-requests) with these changes.
+
+## Using the new image-based verifications for tool testing
+
+The new image-based verifications for Galaxy tool tests https://github.com/galaxyproject/galaxy/pull/17556 and https://github.com/galaxyproject/galaxy/pull/17581 won't be available in Galaxy before 24.1 is released.
+
+Meanwhile, they are already available in the CI of the **galaxy-image-analyis** repostiroy! 🎉 https://github.com/BMCV/galaxy-image-analysis/pull/117
+
+To also use them locally, you need to install the development versions of two Galaxy packages:
+```python
+python -m pip install git+https://git@github.com/galaxyproject/galaxy.git@5c1d045ce7b1e45f85608346baed5455324ee967#subdirectory=packages/util
+python -m pip install git+https://git@github.com/galaxyproject/galaxy.git@5c1d045ce7b1e45f85608346baed5455324ee967#subdirectory=packages/tool_util
+```
+
+The commit [`5c1d045ce7b1e45f85608346baed5455324ee967`](https://github.com/galaxyproject/galaxy/commit/5c1d045ce7b1e45f85608346baed5455324ee967) corresponds to the latest merged bug fixes.
+
+In addition, instead of running `planemo test`, you should use:
+```python
+planemo test --galaxy_source https://github.com/kostrykin/galaxy --galaxy_branch galaxy-image-analysis
+```