ci: add dependabot update config

Author: aquint-zama

.github/dependabot.yml

@@ -0,0 +1,22 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+
+version: 2
+updates:
+  # Enable version updates for npm
+  - package-ecosystem: "npm"
+    # Look for `package.json` and `lock` files in the `root` directory
+    directory: "/"
+    # Check for updates once a week
+    schedule:
+      interval: "weekly"
+
+  # Enable version updates for Github actions
+  - package-ecosystem: "github-action"
+    # Look for a `workflow file` in the `.github` directory
+    directory: "/.github/"
+    # Check for updates once a week
+    schedule:
+      interval: "weekly"