add RELEASE.md

RELEASE.md

@@ -0,0 +1,20 @@
+# Release and version
+
+Steps when releasing:
+
+- Run in terminal
+  ```
+  ESTIMATED_VERSION=1.0.0
+  REPO_NAME=mundialis/grass-gis-helpers
+
+  gh api repos/$REPO_NAME/releases/generate-notes -f tag_name="$ESTIMATED_VERSION" -f target_commitish=main -q .body
+  ```
+- Go to [new release](../../releases/new)
+- Copy the output of terminal command to the release description
+- You can [compare manually](../../compare/1.0.0...main) if all changes are included. If changes were pushed directly to main branch, they are not included.
+- Check if `ESTIMATED_VERSION` increase still fits - we follow [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+- Fill in tag and release title with this version
+- At the bottom of the release, add
+  "generated with `gh api repos/$REPO_NAME/releases/generate-notes -f tag_name="$ESTIMATED_VERSION" -f target_commitish=main -q .body`" and replace `$REPO_NAME` and `$ESTIMATED_VERSION` with the actual version.
+- Make sure that the checkbox for "Set as the latest release" is checked so that this version appears on the main github repo page
+- Now you can save the release