Add shell script for offline read

bin/offline

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+if [ -f offline ];then echo "请在项目根目录执行 $0"; exit 1; fi
+
+command -v docker-compose > /dev/null 2>&1
+
+if [ $? != 0 ];then echo "请安装 docker-compose"; exit 1; fi
+
+if [ "$1" = update ];then
+  status=`git status -s`
+  if [ -z "$status" ];then
+    git fetch --depth=1 origin master
+    git reset --hard origin/master
+  else
+    echo "您已修改项目，请提交或恢复原状！"
+    exit 1
+  fi
+fi
+
+docker-compose up server