修复了docker自动构建的一些问题, 更新了文档

Dockerfile

@@ -3,9 +3,9 @@ FROM mhart/alpine-node:9
 WORKDIR /app
 COPY . /app
 
-RUN    rm -rf node_modules \
-    && rm package-lock.json \
-    && npm config set registry "https://registry.npm.taobao.org/" \
+RUN    rm package-lock.json \
+    ; rm -rf node_modules \
+    ; npm config set registry "https://registry.npm.taobao.org/" \
     && npm install
 
 EXPOSE 3000

docs/README.md

@@ -177,11 +177,11 @@ request 相关的环境变量
 6. NO_PROXY
 
 ```shell
-docker pull twesix/netease-cloud-music:2.8.9
+docker pull twesix/netease-cloud-music
 docker run -d -p 3000:3000 --name netease-cloud-music twesix/netease-music-api
 
 // 去掉或者设置相关的环境变量
-docker run -d -p 3000:3000 --name netease-cloud-music -e http_proxy= -e https_proxy= -e no_proxy= -e HTTP_PROXY= -e HTTPS_PROXY= -e NO_PROXY= netease-cloud-music:2.8.9
+docker run -d -p 3000:3000 --name netease-cloud-music -e http_proxy= -e https_proxy= -e no_proxy= -e HTTP_PROXY= -e HTTPS_PROXY= -e NO_PROXY= netease-cloud-music
 ```
 
 ## 接口文档

package.json

@@ -8,9 +8,17 @@
     "precommit": "lint-staged"
   },
   "lint-staged": {
-    "*.js": ["prettier --write", "git add"]
+    "*.js": [
+      "prettier --write",
+      "git add"
+    ]
   },
-  "keywords": ["网易云音乐", "网易云", "音乐", "网易云音乐nodejs"],
+  "keywords": [
+    "网易云音乐",
+    "网易云",
+    "音乐",
+    "网易云音乐nodejs"
+  ],
   "author": "",
   "license": "MIT",
   "dependencies": {