Add Dockerfile update policy to updatecli-compose (#304)

Author: olblak

updatecli-compose.yaml

@@ -27,6 +27,11 @@ policies:
     values:
       - updatecli/values.d/scm.yaml
       - updatecli/values.d/golang_patch.yaml
+      
+  - name: Update Dockerfilell update
+    policy: ghcr.io/updatecli/policies/autodiscovery/dockerfile:0.7.1 
+    values:
+      - updatecli/values.d/scm.yaml
 
   - name: Update golangci-lint
     policy: ghcr.io/updatecli/policies/golangci-lint/githubaction:0.6.1@sha256:a6f5d1c9e809f7a1eb86d61d2f88be1d11bf1bb4a1dd094dc285425e7f737f3f