Introduce dummy program to help with API releases.

internal/crawl/config/redis/document_keystore/kustomization.yaml

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+resources:
+- redis.yaml
+- service.yaml
+
+commonLabels:
+  app: redis
+  tier: document-keystore

internal/crawl/config/redis/document_keystore/redis.yaml

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+apiVersion: apps/v1
+kind: StatefulSet
+metadata:
+  name: redis-docs-keystore
+spec:
+  serviceName: "redis-docs-keystore"
+  template:
+    spec:
+      containers:
+      - name: redis
+        image: redis:5-alpine
+        imagePullPolicy: Always
+        args:
+          - "--save"
+          - "900"
+          - "1"
+          - "--save"
+          - "30"
+          - "100"
+          - "--appendonly"
+          - "yes"
+        ports:
+        - name: redis-docs-port
+          containerPort: 6379
+        volumeMounts:
+        - mountPath: /data
+          name: redis-docs-keystore-data
+      restartPolicy: Always
+  volumeClaimTemplates:
+  - metadata:
+      name: redis-docs-keystore-data
+    spec:
+      accessModes:
+      - ReadWriteOnce
+      resources:
+        requests:
+          storage: 4Gi

internal/crawl/config/redis/document_keystore/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: redis-docs-keystore
+spec:
+  clusterIP: None
+  ports:
+  - protocol: "TCP"
+    port: 6379
+    targetPort: redis-docs-port