Move hacks to hack (match k8s pattern).

hack/crawl/config/webapp/frontend/deployment.yaml

@@ -0,0 +1,22 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: kustomize-search-ui
+spec:
+  selector:
+    matchLabels:
+      app: kustomize-search
+      tier: frontend
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: kustomize-search
+        tier: frontend
+    spec:
+      containers:
+      - name: frontend
+        image: gcr.io/kustomize-search/frontend:latest
+        ports:
+        - name: frontend-port
+          containerPort: 80

hack/crawl/config/webapp/frontend/kustomization.yaml

@@ -0,0 +1,4 @@
+resources:
+- ../../base
+- deployment.yaml
+- service.yaml

hack/crawl/config/webapp/frontend/service.yaml

@@ -0,0 +1,14 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: kustomize-search-ui
+spec:
+  selector:
+    app: kustomize-search
+    tier: frontend
+  ports:
+  - protocol: "TCP"
+    port: 80
+    targetPort: frontend-port
+  type: LoadBalancer
+  loadBalancerIP: ""