COMDOX-596: Added dependabot file

Author: jeff-matthews

.github/dependabot.yml

@@ -0,0 +1,18 @@
+version: 2
+updates:
+  # Enable version updates for npm
+  - package-ecosystem: "npm"
+    # Look for `package.json` and `lock` files in the `root` directory
+    directory: "/"
+    # Check the npm registry for updates every day (weekdays)
+    schedule:
+      interval: "daily"
+    allow:
+      - dependency-name: "@adobe/gatsby-theme-aio"
+    versioning-strategy: increase
+    open-pull-requests-limit: 25
+    labels:
+      - "dependencies"
+    ignore:
+      # Ignore updates to package
+      - dependency-name: "gatsby"