Add Gin recipe

docs/content/recipes/gin.md

@@ -0,0 +1,53 @@
+---
+title: "Using Gin to setup HTTP handlers"
+description: Setting up HTTP handlers using Gin, a HTTP web framework written in Go.
+linkTitle: Gin
+menu: { main: { parent: 'recipes' } }
+---
+
+Gin is an excellent alternative for the `net/http` router. From their official [GitHub page](https://github.com/gin-gonic/gin):
+
+> Gin is a web framework written in Go (Golang). It features a martini-like API with much better performance, up to 40 times faster thanks to httprouter. If you need performance and good productivity, you will love Gin.
+
+Here are the steps to setup Gin and gqlgen together:
+
+Install Gin:
+```bash
+$ go get gin
+```
+
+In your router file, define the handlers for the GraphQL and Playground endpoints in two different methods and tie then together in the Gin router:
+```go
+import (
+    "github.com/99designs/gqlgen/handler"
+    "github.com/gin-gonic/gin"
+)
+
+// Defining the Graphql handler
+func graphqlHandler() gin.HandlerFunc {
+    // NewExecutableSchema and Config are in the generated.go file
+    // Resolver is in the resolver.go file
+	h := handler.GraphQL(NewExecutableSchema(Config{Resolvers: &Resolver{}}))
+
+	return func(c *gin.Context) {
+		h.ServeHTTP(c.Writer, c.Request)
+	}
+}
+
+// Defining the Playground handler
+func playgroundHandler() gin.HandlerFunc {
+	h := handler.Playground("GraphQL", "/query")
+
+	return func(c *gin.Context) {
+		h.ServeHTTP(c.Writer, c.Request)
+	}
+}
+
+func main() {
+    // Setting up Gin  
+    r := gin.Default()
+	r.POST("/query", graphqlHandler())
+	r.GET("/", playgroundHandler())
+    r.Run()
+}  
+```