Merge pull request #36 from blinklabs-io/chore/ci-dependabot-docker

chore(ci): configure dependabot for docker

Author: wolf31o2

.github/dependabot.yml

@@ -9,3 +9,7 @@ updates:
     directory: "/" # Location of package manifests
     schedule:
       interval: "weekly"
+  - package-ecosystem: "docker" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly"