Merge pull request #1155 from openmina/dw/add-dependabot

CI: add dependabot

Author: dannywillems

.github/dependabot.yml

@@ -0,0 +1,19 @@
+# Please see the documentation for all configuration options:
+# https://docs.github.com/en/code-security/getting-started/dependabot-quickstart-guide
+
+version: 2
+updates:
+  - package-ecosystem: "cargo"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+
+  - package-ecosystem: "docker"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"