Fix cache duration

packages/server/src/http.ts

@@ -32,7 +32,7 @@ const makeProductionWebappRoute = Effect.fnUntraced(function*(route: HttpRouter.
         return yield* HttpServerResponse.setHeader(
             yield* HttpServerResponse.file(exists ? source : path.join(dist, "index.html")),
             "Cache-Control",
-            `public, max-age=${Duration.toSeconds("365 days")}, immutable`,
+            `public, max-age=${Duration.toSeconds("6 hours")}, immutable`,
         )
     }))
 })