想添加主页图标支持，但是似乎不得行？

index.html

@@ -4,6 +4,7 @@
 <meta charset="utf-8">
 <title>智龙迷城队伍图制作工具</title>
 <link rel="shortcut icon" href="images/icon.png" type="image/x-png" />
+<link rel="manifest" href="/manifest.json">
 <meta name="viewport" content="width=device-width,initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no"/>
 <link href="style.css" rel="stylesheet" type="text/css">
 <link href="style-monsterimages.css" rel="stylesheet" type="text/css">

manifest.json

@@ -0,0 +1,16 @@
+{
+	"name": "P&D Dash Formation",
+	"short_name": "P&D-DF",
+	"start_url": "./index.html",
+	"display": "standalone",
+	"background_color": "#52351E",
+	"description": "Puzzle & Dragons Formation Image Maker.",
+	"icons": [{
+	  "src": "images/icon.png",
+	  "sizes": "72x72",
+	  "type": "image/png"
+	}],
+	"related_applications": [{
+	  "platform": "web"
+	}]
+}

multi.html

@@ -4,6 +4,7 @@
 <meta charset="utf-8">
 <title>智龙迷城车队阵型图制作工具</title>
 <link rel="shortcut icon" href="images/icon.png" type="image/x-png" />
+<link rel="manifest" href="/manifest.json">
 <meta name="viewport" content="width=664" />
 <link href="style.css" rel="stylesheet" type="text/css">
 <link href="style-monsterimages.css" rel="stylesheet" type="text/css">

solo.html

@@ -4,6 +4,7 @@
 <meta charset="utf-8">
 <title>智龙迷城车队阵型图制作工具</title>
 <link rel="shortcut icon" href="images/icon.png" type="image/x-png" />
+<link rel="manifest" href="/manifest.json">
 <meta name="viewport" content="width=664" />
 <link href="style.css" rel="stylesheet" type="text/css">
 <link href="style-monsterimages.css" rel="stylesheet" type="text/css">

triple.html

@@ -4,6 +4,7 @@
 <meta charset="utf-8">
 <title>智龙迷城车队阵型图制作工具</title>
 <link rel="shortcut icon" href="images/icon.png" type="image/x-png" />
+<link rel="manifest" href=".manifest.json">
 <meta name="viewport" content="width=756" />
 <link href="style.css" rel="stylesheet" type="text/css">
 <link href="style-monsterimages.css" rel="stylesheet" type="text/css">