add graphql example

#2029

_examples/graphql/schema-first/server.go

@@ -0,0 +1,27 @@
+package main
+
+import (
+	"os"
+
+	"github.com/iris-contrib/outerbanks-api/graph"
+
+	"github.com/99designs/gqlgen/graphql/handler"
+	"github.com/99designs/gqlgen/graphql/playground"
+	"github.com/kataras/iris/v12"
+)
+
+func main() {
+	app := iris.New()
+
+	graphServer := handler.NewDefaultServer(graph.NewExecutableSchema(graph.Config{Resolvers: &graph.Resolver{}}))
+	playgroundHandler := playground.Handler("GraphQL playground", "/query")
+
+	app.Get("/", iris.FromStd(playgroundHandler))          // We use iris.FromStd to convert a standard http.Handler to an iris.Handler.
+	app.Any("/query", iris.FromStd(graphServer.ServeHTTP)) // GET, POST, PUT...
+
+	port := os.Getenv("PORT")
+	if port == "" {
+		port = "8080"
+	}
+	app.Listen(":" + port)
+}