减小背景图片的体积

package.json

@@ -20,7 +20,6 @@
     "@chenfengyuan/vue-qrcode": "^1.0.0",
     "axios": "^0.18.0",
     "iview": "^3.1.2",
-    "json-server": "^0.14.0",
     "moment": "^2.22.2",
     "register-service-worker": "^1.5.2",
     "vue": "^2.5.17",
@@ -41,6 +40,7 @@
     "eslint": "^5.8.0",
     "eslint-plugin-vue": "^5.0.0-0",
     "iview-loader": "^1.2.2",
+    "json-server": "^0.14.0",
     "vue-cli-plugin-iview": "^1.0.6",
     "vue-template-compiler": "^2.5.17"
   }