add favicons

static/favicons/browserconfig.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<browserconfig>
+    <msapplication>
+        <tile>
+            <square150x150logo src="/favicons/mstile-150x150.png"/>
+            <TileColor>#ffffff</TileColor>
+        </tile>
+    </msapplication>
+</browserconfig>

static/favicons/safari-pinned-tab.svg

@@ -0,0 +1 @@
+<svg version="1" xmlns="http://www.w3.org/2000/svg" width="4000" height="4000" viewBox="0 0 3000.000000 3000.000000"><path d="M1457 1c-248.9 7.5-488.2 75.1-704 198.8C575.6 301.5 419 440.6 296.8 605 70.2 909.9-32.1 1287.4 9.6 1665c33.3 302.2 158.7 588.8 358.3 818.5 30.5 35 75.6 81.7 108.1 112 84.1 78.2 171.2 143 267.9 199.4 293.3 171.3 635.8 237.8 972.1 189 283.7-41.2 551-163.7 767.5-351.8 57-49.6 114.9-108.5 163.4-166.1 189.8-225.6 308.3-499.6 342.5-792 21-179 9.2-362.9-34.6-537.5-55.3-221.1-159.4-425.2-305.7-600-62.3-74.3-135.2-145.6-211.1-206.5-247.7-198.5-551.8-313.3-868.5-327.9C1536.8.6 1487 .1 1457 1zm102.6 516c35.7 2.1 80.7 7.5 115.9 14.1 8.8 1.7 35.1 7 58.5 11.9 56.3 11.8 67.2 13.4 86.5 12.6 8.3-.3 19.7-1.4 25.5-2.5 5.8-1.1 18.8-3.5 29-5.5 40.7-7.7 68.8-10.1 89.8-7.7 29.5 3.5 49.9 14.5 58.2 31.4 4.3 8.9 4.8 14.7 3.9 41.5-.5 13-3.8 110.1-7.4 215.7-5.4 160.1-6.8 192.7-8.1 196.2-6.1 16.5-37.7 28.3-75.6 28.3-28.2 0-49.1-5.5-61.2-16.1-8.6-7.6-8.8-8.6-9.7-39.4-2.6-91.8-21.3-163.1-57-217-55.5-83.7-155.7-125.5-301.2-125.5-138.1 0-254.5 51.4-328.3 145.1-36.2 45.9-58.8 101.1-65.4 159.9-2.8 24.2-1 67.4 4 96.7 24.2 141.5 132 243.9 316 300.1 34.1 10.4 58.8 16.5 109.5 26.8 86.1 17.6 150.2 35.9 213.5 61.1 90.8 36.1 161.5 80 218.5 135.4 82.4 80.2 129.2 181.1 142 306.4 3.4 33.4 4.4 73.5 2.5 102-9.9 148.3-87.4 283.9-214.4 375-84.1 60.3-189 99.6-303.6 113.9-33.5 4.2-55.5 5.7-94 6.3-68.9 1.1-124.9-2.5-245.5-15.7-85-9.3-86.5-9.4-113.5-9.4-27.8.1-36 .8-80 6.9-72.1 10-109.2 9.6-132.9-1.7-9.4-4.4-19.7-14.9-24.4-24.8-8.4-17.6-9.5-27.4-10.7-88.5-.5-28.1-1.7-85-2.5-126.5-2.4-119.7-3.8-273.9-2.6-281.5 1.4-9.2 4.4-15 11.6-22 6.5-6.5 17.1-12.6 28.5-16.5 35.9-12.2 85.6-9.4 105 6 5.5 4.4 7.7 9.7 8.5 21 3.9 57 17.5 121.3 36.2 170 23.7 61.8 57 112.1 98.5 148.5 57.9 50.7 132.5 81.3 222.8 91.5 151 17 274.9-19.9 366.4-109 61.1-59.5 98-134.4 108.7-220.5 1.7-13.1 1.6-56.4 0-73-8-80.9-38.1-144.6-94.2-198.9-59.2-57.4-149.1-103.7-268.5-138.1-25.9-7.5-50.3-13.7-92.4-23.5-107.6-25-187.7-52.6-263-90.6-159.6-80.5-251.2-193.8-275.9-341.5-5.2-30.8-6.5-47.8-6.5-85.4 0-25.8.4-38.1 1.8-51C895.2 888 945 780.7 1028 695.6c43.1-44.1 89.7-78 147-106.7 86.3-43.2 183.7-66.7 298.5-72.2 16.1-.8 70.3-.6 86.1.3z"/></svg>

static/favicons/site.webmanifest

@@ -0,0 +1,18 @@
+{
+    "name": "",
+    "short_name": "",
+    "icons": [
+        {
+            "src": "/favicons/android-chrome-192x192.png",
+            "sizes": "192x192",
+            "type": "image/png"
+        },
+        {
+            "src": "/favicons/android-chrome-512x512.png",
+            "sizes": "512x512",
+            "type": "image/png"
+        }
+    ],
+    "theme_color": "#ffffff",
+    "background_color": "#ffffff"
+}