feat: bundle browser dependencies locally

src/server/page-template.ts

@@ -7,12 +7,7 @@ export function htmlPage(): string {
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
     <title>mapix</title>
-    <link
-      rel="stylesheet"
-      href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css"
-      integrity="sha256-p4NxAoJBhIIN+hmNHrzRCf9tD/miZyoHS5obTRR9BMY="
-      crossorigin=""
-    />
+    <link rel="stylesheet" href="/vendor/leaflet/leaflet.css" />
     <style>
 ${APP_STYLES}
     </style>
@@ -153,7 +148,7 @@ ${APP_STYLES}
       </div>
     </div>
 
-    <script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js" integrity="sha256-20nQCchB9co0qIjJZRGuk2/Z9VM+kNiyxNV1lvTlZBo=" crossorigin=""></script>
+    <script src="/vendor/leaflet/leaflet.js"></script>
     <script type="module" src="/client/app.js"></script>
   </body>
 </html>`;