cache DNS queries in bootstrap DNS (#454)

go.mod

@@ -29,19 +29,29 @@ require (
 )
 
 require (
+	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751
 	github.com/avast/retry-go/v4 v4.0.3
 	github.com/go-chi/chi/v5 v5.0.7
 	github.com/hashicorp/golang-lru v0.5.4
+	github.com/ncruces/go-dns v1.1.0
 	github.com/onsi/ginkgo/v2 v2.1.3
+	github.com/swaggo/swag v1.8.0
 	gorm.io/driver/postgres v1.3.1
 )
 
 require (
+	github.com/KyleBanks/depth v1.2.1 // indirect
+	github.com/PuerkitoBio/purell v1.1.1 // indirect
+	github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578 // indirect
 	github.com/alicebob/gopher-json v0.0.0-20200520072559-a9ecdc9d1d3a // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.1.2 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
+	github.com/go-openapi/jsonpointer v0.19.5 // indirect
+	github.com/go-openapi/jsonreference v0.19.6 // indirect
+	github.com/go-openapi/spec v0.20.4 // indirect
+	github.com/go-openapi/swag v0.19.15 // indirect
 	github.com/go-sql-driver/mysql v1.6.0 // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/hashicorp/errwrap v1.1.0 // indirect
@@ -56,7 +66,8 @@ require (
 	github.com/jackc/pgx/v4 v4.14.1 // indirect
 	github.com/jinzhu/inflection v1.0.0 // indirect
 	github.com/jinzhu/now v1.1.4 // indirect
-	github.com/kr/text v0.2.0 // indirect
+	github.com/josharian/intern v1.0.0 // indirect
+	github.com/mailru/easyjson v0.7.6 // indirect
 	github.com/mattn/go-isatty v0.0.14 // indirect
 	github.com/mattn/go-sqlite3 v1.14.9 // indirect
 	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect