Move hacks to hack (match k8s pattern).

hack/crawl/config/redis/http_cache/kustomization.yaml

@@ -0,0 +1,7 @@
+resources:
+- redis.yaml
+- service.yaml
+
+commonLabels:
+  app: redis
+  tier: http-cache

hack/crawl/config/redis/http_cache/redis.yaml

@@ -0,0 +1,16 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: redis-http-cache
+spec:
+  template:
+    spec:
+      containers:
+      - name: redis
+        image: redis:5-alpine
+        imagePullPolicy: Always
+        # see redis.io/topics/lru-cache for other policy options.
+        args: ["--maxmemory", "1gb", "--maxmemory-policy", "allkeys-lru"]
+        ports:
+        - name: http-cache-port
+          containerPort: 6379

hack/crawl/config/redis/http_cache/service.yaml

@@ -0,0 +1,10 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: redis-http-cache
+spec:
+  clusterIP: None
+  ports:
+  - protocol: "TCP"
+    port: 6379
+    targetPort: http-cache-port