chore: add maintainers guide (#4348)

Co-authored-by: Ron <[email protected]>

Author: npalm

MAINTAINERS.md

@@ -1 +1,36 @@
-Niek Palm <[email protected]>
+# Maintainers guide
+
+Roles and responsibilities of the maintainers of the project.
+
+## Maintainers
+
+| Name      | GitHub   | Affiliation |
+| --------- | -------- | ----------- |
+| Niek Palm | [@npalm] | Philips     |
+
+## Responsibilities
+
+### Pull Requests
+
+Maintainers are responsible to review and merge pull requests. Currently we have no end-to-end automation to test a pull request. Here a short guide how to review a pull request.
+
+#### Guidelines
+
+- Check if changes are implemented for both modules (root and multi-runner)
+- Check backwards compatibility, we strive to keep the module compatible with previous versions
+- Check complexity of the changes, if the changes are too complex. Think about how does impact the PR on the long term maintaining the module.
+- Check all pipelines are passing, if not request the author to fix the issues
+- In case any new dependency is added ensure we can trust and rely on the dependency. Make explicit comments in the PR that the dependency is safe to use.
+
+#### Test
+
+The following steps needs to be applied to test a PR
+
+1. Check to which deployment scenario the PR belongs to: "single runner (default example)" or "multi runner"
+2. Deploy per scenario the main branch
+3. Apply the PR to the deployment. Check output for breaking changes such as destroying resources containing state.
+4. Test the PR by running a workflow
+
+### Security
+
+Act on security issues as soon as possible. If a security issue is reported.