Create Dependabot config file (#164)

.github/dependabot.yml

@@ -0,0 +1,19 @@
+version: 2
+
+updates:
+- package-ecosystem: npm
+  directory: "/"
+  schedule:
+    interval: daily
+  versioning-strategy: increase
+  open-pull-requests-limit: 99
+
+- package-ecosystem: docker
+  directory: "/"
+  schedule:
+    interval: daily
+
+- package-ecosystem: github-actions
+  directory: "/"
+  schedule:
+    interval: daily