chore(examples): add example nginx chart

examples/charts/nginx/Chart.yaml

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+name: nginx
+home: https://www.nginx.com
+version: 0.0.1
+description: nginx http service
+maintainers:
+  - Michelle Noorali <michelle@deis.com>
+details:
+  This is a basic nginx http service.
+keywords:
+  - web server
+  - http
+  - https
+  - proxy

examples/charts/nginx/README.md

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+This is an example of an nginx chart.

examples/charts/nginx/templates/nginx-rc.yaml

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+apiVersion: v1
+kind: ReplicationController
+metadata:
+  name: nginx
+spec:
+  replicas: 1
+  selector:
+    name: nginx
+  template:
+    metadata:
+      labels:
+        name: nginx
+    spec:
+      containers:
+      - name: nginx
+        image: nginx
+        ports:
+        - containerPort: 80

examples/charts/nginx/templates/nginx-svc.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: nginx
+  labels:
+    app: nginx
+spec:
+  ports:
+  - port: 80
+    protocol: TCP
+    name: http
+  selector:
+    name: nginx