diff --git a/.nvmrc b/.nvmrc
new file mode 100644
index 0000000000000000000000000000000000000000..7f784879b038bab788fa992e943634f204fbf6f5
--- /dev/null
+++ b/.nvmrc
@@ -0,0 +1 @@
+v12.22.6
diff --git a/package.json b/package.json
index a20003f914290c0a1824a3404829911dbb9316f3..11aa329581c4a0eba624fb9294760178d8598aa5 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,8 @@
   "main": "index.js",
   "private": true,
   "scripts": {
-    "dev": "live-server"
+    "dev": "live-server",
+    "start": "http-server"
   },
   "repository": {
     "type": "git",
@@ -19,6 +20,7 @@
   },
   "homepage": "https://github.com/mouday/coding-tree#readme",
   "devDependencies": {
-    "docsify": "^4.12.2"
+    "docsify": "^4.12.2",
+    "http-server": "^14.1.0"
   }
 }