diff --git a/.env.development b/.env.development
index 002371a0..f68e3e06 100644
--- a/.env.development
+++ b/.env.development
@@ -1,4 +1,5 @@
-VUE_APP_BASE_API = '/api-dev'
+VUE_APP_BASE_API = '/api'
+ENV = 'development'
 
 // With this configuration, vue-cli uses babel-plugin-dynamic-import-node
 // It only does one thing by converting all import() to require()
diff --git a/.env.production b/.env.production
index 6823bd93..8ea6337a 100644
--- a/.env.production
+++ b/.env.production
@@ -1 +1,2 @@
-VUE_APP_BASE_API = '/api-prod'
+VUE_APP_BASE_API = '/api'
+ENV = 'production'
diff --git a/.env.sit b/.env.sit
deleted file mode 100644
index 81839fe2..00000000
--- a/.env.sit
+++ /dev/null
@@ -1,2 +0,0 @@
-NODE_ENV=production
-VUE_APP_BASE_API = '/api-sit'
diff --git a/.env.staging b/.env.staging
new file mode 100644
index 00000000..2015f804
--- /dev/null
+++ b/.env.staging
@@ -0,0 +1,3 @@
+NODE_ENV=production
+VUE_APP_BASE_API = '/api'
+ENV = 'staging'
diff --git a/package.json b/package.json
index 0c2b1656..a18a8a33 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
   "scripts": {
     "dev": "vue-cli-service serve",
     "build:prod": "vue-cli-service build",
-    "build:sit": "vue-cli-service build --mode sit",
+    "build:stage": "vue-cli-service build --mode staging",
     "build:preview": "node build/index.js --preview",
     "build:report": "node build/index.js --report",
     "lint": "eslint --ext .js,.vue src",
@@ -39,31 +39,31 @@
   "dependencies": {
     "axios": "0.18.0",
     "clipboard": "1.7.1",
-    "codemirror": "5.42.0",
-    "driver.js": "0.8.1",
+    "codemirror": "5.44.0",
+    "driver.js": "0.9.5",
     "dropzone": "5.5.1",
     "echarts": "4.1.0",
-    "element-ui": "2.4.10",
-    "file-saver": "1.3.8",
-    "fuse.js": "3.4.2",
+    "element-ui": "2.6.1",
+    "file-saver": "2.0.1",
+    "fuse.js": "3.4.4",
     "js-cookie": "2.2.0",
     "jsonlint": "1.6.3",
-    "jszip": "3.1.5",
+    "jszip": "3.2.0",
     "normalize.css": "7.0.0",
     "nprogress": "0.2.0",
     "path-to-regexp": "2.4.0",
-    "screenfull": "4.0.0",
-    "showdown": "1.8.6",
-    "sortablejs": "1.7.0",
-    "tui-editor": "1.2.7",
-    "vue": "2.5.17",
+    "screenfull": "4.0.1",
+    "showdown": "1.9.0",
+    "sortablejs": "1.8.3",
+    "tui-editor": "1.3.2",
+    "vue": "2.6.8",
     "vue-count-to": "1.0.13",
     "vue-i18n": "7.3.2",
     "vue-router": "3.0.2",
     "vue-splitpane": "1.0.2",
     "vuedraggable": "2.17.0",
-    "vuex": "3.0.1",
-    "xlsx": "^0.11.16"
+    "vuex": "3.1.0",
+    "xlsx": "0.14.1"
   },
   "devDependencies": {
     "@babel/core": "7.0.0",
@@ -76,8 +76,8 @@
     "babel-core": "7.0.0-bridge.0",
     "babel-eslint": "10.0.1",
     "babel-jest": "23.6.0",
-    "chalk": "^2.4.1",
-    "connect": "^3.6.6",
+    "chalk": "2.4.2",
+    "connect": "3.6.6",
     "eslint": "5.15.1",
     "eslint-plugin-vue": "5.2.2",
     "husky": "0.14.3",
@@ -90,8 +90,8 @@
     "script-loader": "0.7.2",
     "serve-static": "^1.13.2",
     "svg-sprite-loader": "4.1.3",
-    "svgo": "1.1.1",
-    "vue-template-compiler": "2.5.17"
+    "svgo": "1.2.0",
+    "vue-template-compiler": "2.6.8"
   },
   "engines": {
     "node": ">=8.9",
diff --git a/src/components/HeaderSearch/index.vue b/src/components/HeaderSearch/index.vue
index d3acfb62..f3adb327 100644
--- a/src/components/HeaderSearch/index.vue
+++ b/src/components/HeaderSearch/index.vue
@@ -18,6 +18,8 @@
 </template>
 
 <script>
+// fuse is a lightweight fuzzy-search module
+// make search results more in line with expectations
 import Fuse from 'fuse.js'
 import path from 'path'
 import i18n from '@/lang'