Initial add of cloud-demo

examples/update-demo/image/Dockerfile

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+FROM dockerfile/nginx
+
+ADD data.json /usr/share/nginx/html/data.json
+ADD default /etc/nginx/sites-available/default
+RUN chmod a+r /usr/share/nginx/html/data.json
+
+CMD ["nginx"]

examples/update-demo/image/data.json

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+{
+  "color": "#0FF"
+}

examples/update-demo/image/default

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+server {
+        listen 80 default_server;
+        listen [::]:80 default_server ipv6only=on;
+
+        root /usr/share/nginx/html;
+        index index.html index.htm;
+
+        # Make site accessible from http://localhost/
+        server_name localhost;
+
+        location / {
+                try_files $uri $uri/ =404;
+                expires           0;
+    		add_header        Cache-Control private;
+
+		if ($request_method = 'GET') {
+ 		   add_header 'Access-Control-Allow-Origin' '*';
+        	   add_header 'Access-Control-Allow-Credentials' 'true';
+        	   add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
+        	   add_header 'Access-Control-Allow-Headers' 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
+     		}
+         }
+}