fix influxdb ip

@@ -8,7 +8,7 @@ const influx = require('influx');
 
 let client = influx({
     hosts: [{
-        host: '54.222.219.223',
+        host: '172.31.56.150',
         port: 8086,
         protocol: 'http'
     }],

@@ -27,6 +27,10 @@ const monitor = {
                 name: '线上环境',
                 value: 'production',
                 checked: env === 'production'
+            },{
+                name: '灰度环境',
+                value: 'preview',
+                checked: env === 'preview'
             }, {
                 name: '测试环境',
                 value: 'test',