Add release procedure

Signed-off-by: Jeff Mesnil <[email protected]>

RELEASE_PROCEDURE.adoc

@@ -0,0 +1,18 @@
+# Release Procedure
+
+the `smallrye/smallry-parent` project relies on a GitHub action to create its release.
+
+## Create a PR to prepare the release
+
+By convention, use a branch named `release-<x.y.z>` where `x.y.z` is the version that is about to be released.
+
+The PR should only contain changes to the `.github/project.yml` file and specifies the version to release, and the next version to set in the POM (with a trailing `-SNAPSHOT`).
+
+This PR must be pushed to the https://github.com/smallrye/smallrye-parent[`smallrye/smallry-parent`] repository. Pushing it to a fork will not create a release.
+
+Once this PR is opened, it will check that it can be used to create a release.
+
+Once merged, a GitHub action will update the project and and perform the release to deploy the artifacts in https://repo1.maven.org/maven2/io/smallrye/smallrye-parent/[Maven Central].
+
+
+The GitHub action also creates https://github.com/smallrye/smallrye-parent/releases[Release Notes] corresponding to the new tag.