Move hacks to hack (match k8s pattern).

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

@@ -0,0 +1,38 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: kustomize-search
+spec:
+  selector:
+    matchLabels:
+      app: kustomize-search
+      tier: backend
+  replicas: 1
+  template:
+    metadata:
+      labels:
+        app: kustomize-search
+        tier: backend
+    spec:
+      containers:
+      - name: kustomize-search
+        image: gcr.io/kustomize-search/backend:latest
+        livenessProbe:
+          httpGet:
+            path: /liveness
+            port: backend-port
+        readinessProbe:
+          httpGet:
+            path: /readiness
+            port: backend-port
+        ports:
+        - name: backend-port
+          containerPort: 8080
+        env:
+        - name: ELASTICSEARCH_URL
+          valueFrom:
+            configMapKeyRef:
+              name: elasticsearch-config
+              key: es-url
+        - name: PORT
+          value: "8080"