Migrate from Blaze to Ember

src/main/scala/fetch/FetchService.scala

@@ -3,9 +3,9 @@ package fetch
 import cats.effect._
 import cats.implicits._
 import org.http4s._
-import org.http4s.blaze.client.BlazeClientBuilder
 import org.http4s.client.Client
 import org.http4s.headers.Authorization
+import org.http4s.ember.client.EmberClientBuilder
 
 import pureconfig._
 import pureconfig.generic.auto._
@@ -45,7 +45,7 @@ object FetchService {
 
   private def fetchFiles(fileNames: List[String]): IO[List[Either[Throwable, (String, String)]]] = {
     val IOUrls = baseUrl.map(baseUrl => fileNames.map(baseUrl / _))
-    BlazeClientBuilder[IO](global).resource.use { client =>
+    EmberClientBuilder.default[IO].build.use { client =>
       IOUrls.flatMap(_.traverse(url => makeRequest(client, url)))
     }
   }