feat(web): implement web server foundation

src/web/router.ts

@@ -0,0 +1,33 @@
+import { homeRoute } from "./routes/home";
+import { healthRoute } from "./routes/health";
+import { file } from "bun";
+import { join } from "path";
+
+export async function router(request: Request): Promise<Response> {
+    const url = new URL(request.url);
+    const method = request.method;
+
+    // Serve static files from src/web/public
+    // We treat any path with a dot or starting with specific assets paths as static file candidates
+    if (url.pathname.includes(".") || url.pathname.startsWith("/public/")) {
+        // Sanitize path to prevent directory traversal
+        const safePath = url.pathname.replace(/^(\.\.[\/\\])+/, '');
+        const filePath = join(import.meta.dir, "public", safePath);
+
+        const staticFile = file(filePath);
+        if (await staticFile.exists()) {
+            return new Response(staticFile);
+        }
+    }
+
+    if (method === "GET") {
+        if (url.pathname === "/" || url.pathname === "/index.html") {
+            return homeRoute();
+        }
+        if (url.pathname === "/health") {
+            return healthRoute();
+        }
+    }
+
+    return new Response("Not Found", { status: 404 });
+}