Setup doc redirects for old routes (#1501)

firebase.json

@@ -1,11 +1,41 @@
 {
   "hosting": {
+    "site": "yew-rs",
     "public": "website/build/yew",
     "ignore": [
       "firebase.json",
       "**/.*",
       "**/node_modules/**"
     ],
+    "redirects": [ {
+      "source": "/",
+      "destination": "/docs/en/intro/",
+      "type": 301
+    }, {
+      "source": "/docs",
+      "destination": "/docs/en/intro/",
+      "type": 301
+    }, {
+      "regex": "/(docs/)?(?P<lang>en|ja|zh-TW|zh-CN)",
+      "destination": "/docs/:lang/intro/",
+      "type": 301
+    }, {
+      "source": "/docs/v/zh_cn",
+      "destination": "/docs/zh-CN/intro/",
+      "type": 301
+    }, {
+      "source": "/docs/v/zh_tw",
+      "destination": "/docs/zh-TW/intro/",
+      "type": 301
+    }, {
+      "regex": "/docs/v/zh_cn/(.*)",
+      "destination": "/docs/zh-CN/:1",
+      "type": 301
+    }, {
+      "regex": "/docs/v/zh_tw/(.*)",
+      "destination": "/docs/zh-TW/:1",
+      "type": 301
+    } ],
     "rewrites": [
       {
         "source": "**",

website/static/index.html

@@ -7,29 +7,7 @@
       content="0; url=/docs/en/intro"
     />
     <script type="text/javascript">
-      // Redirect old translated paths
+      window.location.href = '/docs/en/intro';
-      if (window.location.pathname.includes('/v/')) {
-        var pathname = window.location.pathname.replace('/v/zh_cn', '/zh-CN').replace('/v/zh_tw', '/zh-TW');
-        if (pathname === window.location.pathname) {
-          window.location.href = '/docs/en/intro';
-        } else {
-          if (pathname.endsWith('/')) {
-            pathname = pathname.substring(0, pathname.length - 1);
-          }
-          if (pathname.endsWith('zh-CN') || pathname.endsWith('zh-TW')) {
-            pathname += '/intro';
-          }
-          window.location.href = pathname;
-        }
-      // Redirect broken links
-      } else if (window.location.pathname.includes('/zh-TW')) {
-        window.location.href = '/docs/zh-TW/intro';
-      // Redirect broken links
-      } else if (window.location.pathname.includes('/zh-CN')) {
-        window.location.href = '/docs/zh-CN/intro';
-      } else {
-        window.location.href = '/docs/en/intro';
-      }
     </script>
     <title>Yew Docs</title>
   </head>