add to devDependencies

visualdl/frontend/package.json

@@ -17,7 +17,6 @@
   },
   "dependencies": {
     "axios": "^0.16.1",
-    "express": "^4.16.2",
     "file-saver": "^1.3.3",
     "lodash": "^4.17.4",
     "normalize.css": "^6.0.0",
@@ -26,7 +25,6 @@
     "san-router": "^1.1.1",
     "san-store": "^1.0.1",
     "san-update": "^2.1.0",
-    "webpack-dev-middleware": "^1.12.1",
     "xlsx": "^0.11.3"
   },
   "devDependencies": {
@@ -45,6 +43,7 @@
     "copy-webpack-plugin": "^4.0.1",
     "cross-env": "^4.0.0",
     "css-loader": "^0.28.0",
+    "express": "^4.16.2",
     "extract-text-webpack-plugin": "^2.1.0",
     "fecs": "^1.5.2",
     "file-loader": "^0.11.1",
@@ -60,12 +59,14 @@
     "ora": "^1.1.0",
     "postcss-loader": "^1.3.3",
     "raw-loader": "^0.5.1",
+    "rimraf": "^2.6.2",
     "san-loader": "^0.0.4",
     "style-loader": "^0.16.1",
     "stylus": "^0.54.5",
     "stylus-loader": "^3.0.1",
     "url-loader": "^0.5.8",
     "webpack": "^2.4.1",
+    "webpack-dev-middleware": "^1.12.1",
     "webpack-dev-server": "^2.4.2",
     "webpack-hot-middleware": "^2.19.1",
     "webpack-merge": "^4.1.0",