chore(review): add favicon in various sizes

public/app.webmanifest

@@ -1,15 +1,58 @@
 {
   "short_name": "SIGit",
   "name": "SIGit",
+  "description": "A decentralised document signing tool",
   "icons": [
     {
-      "src": "favicon.png",
-      "sizes": "16x16 24x24 32x32 48x48 64x64 72x72 96x96 128x128 256x256 512x512",
+      "src": "favicon-512x512.png",
+      "sizes": "512x512",
+      "type": "image/png"
+    },
+    {
+      "src": "favicon-384x384.png",
+      "sizes": "384x384",
+      "type": "image/png"
+    },
+    {
+      "src": "favicon-256x256.png",
+      "sizes": "256x256",
+      "type": "image/png"
+    },
+    {
+      "src": "favicon-192x192.png",
+      "sizes": "192x192",
+      "type": "image/png"
+    },
+    {
+      "src": "favicon-144x144.png",
+      "sizes": "144x144",
+      "type": "image/png"
+    },
+    {
+      "src": "favicon-128x128.png",
+      "sizes": "128x128",
+      "type": "image/png"
+    },
+    {
+      "src": "favicon-96x96.png",
+      "sizes": "96x96",
+      "type": "image/png"
+    },
+    {
+      "src": "favicon-72x72.png",
+      "sizes": "72x72",
+      "type": "image/png"
+    },
+    {
+      "src": "favicon-64x64.png",
+      "sizes": "64x64",
       "type": "image/png"
     }
   ],
-  "start_url": ".",
+  "start_url": "/",
+  "display_override": ["minimal-ui", "standalone"],
   "display": "minimal-ui",
+  "orientation": "any",
   "theme_color": "#7d54a3",
   "background_color": "#ffffff"
 }

public/favicon.svg

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg id="Layer_2" data-name="Layer 2" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 282.61 282.61">
+  <defs>
+    <style>
+      .cls-1 {
+        fill: #47b17d;
+      }
+
+      .cls-2 {
+        fill: #4c82a3;
+      }
+
+      .cls-3 {
+        fill: #7d54a3;
+      }
+    </style>
+  </defs>
+  <g id="Layer_1-2" data-name="Layer 1" transform="translate(0, 13.775)">
+    <g>
+      <path class="cls-2" d="M181.53,115.06h0c-9.4-36.67-56.77-24.79-121.09-12.57C-3.54,114.64-25.35,19.85,37.72,3.62,46.91,1.26,56.55,0,66.47,0c63.55,0,115.06,51.51,115.06,115.06Z"/>
+      <path class="cls-1" d="M100,140h0c9.4,36.67,56.77,24.79,121.09,12.57,63.98-12.16,85.79,82.64,22.72,98.86-9.19,2.36-18.83,3.62-28.76,3.62-63.55,0-115.06-51.51-115.06-115.06Z"/>
+      <circle class="cls-3" cx="140.77" cy="127.53" r="24.88"/>
+    </g>
+  </g>
+</svg>