[logdog] Begin migrating to Makefile.

logdog/appengine/cmd/coordinator/backend/module-backend.yaml

+# Copyright 2017 The LUCI Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+service: backend
+runtime: go
+api_version: go1
+
+instance_class: IC_2
+
+handlers:
+- url: "/debug/*"
+  script: _go_app
+  secure: always
+  login: admin
+
+- url: "/.*"
+  script: _go_app
+  secure: always
+  login: admin