修复：完善数据迁移；修改logo及课程首页接口文件覆盖问题；

pages/visitor/index.vue

@@ -58,7 +58,7 @@
 				href: 'https://a.app.qq.com/o/simple.jsp?pkgname=com.cn.medicine',
 				title: "吴门医述",
 				summary: "我正在使用吴门医述提升自己，赶紧跟我一起来体验吧！",
-				imageUrl: "static/icon/home_icon_logo.png",
+				imageUrl: "static/logo.png",
 				success: function (res) {
 					console.log("success:" + JSON.stringify(res));
 				},
@@ -75,7 +75,7 @@
 				href: 'https://a.app.qq.com/o/simple.jsp?pkgname=com.cn.medicine',
 				title: "吴门医述",
 				summary: "我正在使用吴门医述提升自己，赶紧跟我一起来体验吧！",
-				imageUrl: "static/icon/home_icon_logo.png",
+				imageUrl: "static/logo.png",
 				success: function (res) {
 					console.log("success:" + JSON.stringify(res));
 				},