Add k8s deployment for rtn-k8s

Dockerfile

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+FROM node:8
+WORKDIR /usr/src/app
+ADD package.json .
+ADD config.js .
+ADD server.js .
+ADD public/ .
+
+RUN npm install
+
+
+ENV ENV_NAME prod
+ENV REDIS_URL redis
+
+EXPOSE 3000
+
+ENTRYPOINT ["node", "server.js"]

k8s/deployments.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: rtn-k8s-deployment
+  labels:
+    app: rtn-k8s
+spec:
+  replicas: 3
+  selector:
+    matchLabels:
+      app: rtn-k8s
+  template:
+    metadata:
+      labels:
+        app: rtn-k8s
+    spec:
+      containers:
+      - name: rtn-k8s
+        image: gcr.io/rtn-k8s/rtn-k8s:1.0
+        ports:
+        - containerPort: 3000