Include Web Manifest (#273)

* Include Web Manifest

Now we need to fix the path, which shouldn't be hard.

* Delete unused icon

* Remove Thumbs.db

That file was automatically generated

* Fixed icon path

* Fixed typo

client/src/assets/images/icons/.gitignore

@@ -0,0 +1 @@
+Thumbs.db

client/src/index.html

@@ -7,6 +7,8 @@
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <meta name="description" content="PeerTube, a decentralized video streaming platform using P2P (BitTorrent) directly in the web browser" />
 
+    <!-- Web Manifest file -->
+    <link rel="manifest" href="manifest.json">
     <!-- The following comment is used by the server to prerender OpenGraph and oEmbed tags -->
     <!-- open graph and oembed tags -->
     <!-- Do not remove it! -->

client/src/manifest.json

@@ -0,0 +1,40 @@
+{
+  "background_color": "gray",
+  "description": "A federated decentralized video streaming platform",
+  "display": "fullscreen",
+  "icons": [
+	{
+      "src": "/client/assets/images/icons/hdpi.png",
+      "sizes": "72x72",
+      "type": "image/png"
+    },
+	{
+      "src": "/client/assets/images/icons/ldpi.png",
+      "sizes": "36x36",
+      "type": "image/png"
+    },
+	{
+      "src": "/client/assets/images/icons/mdpi.png",
+      "sizes": "48x48",
+      "type": "image/png"
+    },
+	{
+      "src": "/client/assets/images/icons/xhdpi.png",
+      "sizes": "96x96",
+      "type": "image/png"
+    },	
+	{
+      "src": "/client/assets/images/icons/xxhdpi.png",
+      "sizes": "144x144",
+      "type": "image/png"
+    },
+	{
+      "src": "/client/assets/images/icons/xxxhdpi.png",
+      "sizes": "192x192",
+      "type": "image/png"
+    }	
+  ],
+  "name": "PeerTube",
+  "short_name": "PeerTube",
+  "start_url": "/videos/recently-added"
+}