Add PWA support and miner race

apps/web/public/miners/bitaxe.svg

@@ -0,0 +1,15 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 320 220" role="img" aria-label="Bitaxe miner">
+  <rect width="320" height="220" fill="none"/>
+  <g filter="url(#g)">
+    <rect x="72" y="70" width="176" height="84" rx="12" fill="#152033" stroke="#6cff8c" stroke-width="4"/>
+    <rect x="94" y="88" width="56" height="48" rx="6" fill="#0b0f19" stroke="#29ffe6" stroke-width="3"/>
+    <circle cx="122" cy="112" r="18" fill="#07090f" stroke="#ff3df0" stroke-width="5"/>
+    <path d="M122 94v36M104 112h36" stroke="#ffd84a" stroke-width="3"/>
+    <rect x="166" y="90" width="54" height="18" rx="3" fill="#29ffe6" opacity=".85"/>
+    <rect x="166" y="118" width="38" height="10" rx="3" fill="#ff3df0" opacity=".85"/>
+    <path d="M86 154h148M104 170h112" stroke="#475569" stroke-width="7" stroke-linecap="round"/>
+    <circle cx="80" cy="80" r="5" fill="#ffd84a"/>
+    <circle cx="240" cy="80" r="5" fill="#ffd84a"/>
+  </g>
+  <defs><filter id="g"><feDropShadow dx="0" dy="8" stdDeviation="8" flood-color="#000" flood-opacity=".55"/></filter></defs>
+</svg>