rename handler files

server/handlers/playground.go

@@ -0,0 +1,15 @@
+package handlers
+
+import (
+	"github.com/99designs/gqlgen/graphql/playground"
+	"github.com/gin-gonic/gin"
+)
+
+// Defining the Playground handler
+func PlaygroundHandler() gin.HandlerFunc {
+	h := playground.Handler("GraphQL", "/graphql")
+
+	return func(c *gin.Context) {
+		h.ServeHTTP(c.Writer, c.Request)
+	}
+}