Migrste from Mergify/CircleCi to Tide/Prow (kubernetes#206)

Makefile

@@ -0,0 +1,5 @@
+img := gcr.io/istio-testing/website-tools:2019-07-25
+docker := docker run -e -t -i --sig-proxy=true --rm -v $(shell pwd):/foo -w /foo $(img)
+
+lint:
+	@$(docker) prow/community-lint.sh

README.md

@@ -1,6 +1,3 @@
-[![CircleCI](https://circleci.com/gh/istio/community.svg?style=svg)](https://circleci.com/gh/istio/community)
-[![Mergify Status](https://gh.mergify.io/badges/istio/community.png?style=cut)](https://mergify.io)
-
 # Istio Community
 
 Welcome to the Istio community!

prow/community-lint.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+# Copyright 2019 Istio 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.
+
+set -e
+awesome_bot --skip-save-result --allow-ssl --allow-timeout --allow-dupe --allow-redirect --white-list *.md