add dependabot config

.github/dependabot.yml

@@ -0,0 +1,24 @@
+# Dependabot creates pull requests to keep your dependencies secure and up-to-date.
+# Documentation: https://docs.github.com/en/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+
+  - package-ecosystem: 'github-actions'
+    directory: '/'
+    open-pull-requests-limit: 10
+    schedule:
+      interval: 'weekly'
+      day: 'monday'
+    reviewers:
+      - 'hanspagel'
+
+  - package-ecosystem: 'npm'
+    directory: '/'
+    open-pull-requests-limit: 10
+    schedule:
+      interval: 'weekly'
+      day: 'monday'
+    reviewers:
+      - 'hanspagel'
+      - 'philippkuehn'