feat: add new endpoint and improve middleware functionality

- Modify gzip middleware to exclude `/ping2` path
- Add middleware to log request and response times
- Add new endpoint `/ping2` that returns current Unix timestamp

Signed-off-by: appleboy <[email protected]>

_example/main.go

@@ -12,10 +12,22 @@ import (
 
 func main() {
 	r := gin.Default()
-	r.Use(gzip.Gzip(gzip.DefaultCompression))
+	r.Use(gzip.Gzip(
+		gzip.DefaultCompression,
+		gzip.WithExcludedPaths([]string{"/ping2"}),
+	))
+	r.Use(func(c *gin.Context) {
+		log.Println("Request received")
+		c.Next()
+		log.Println("Response sent")
+	})
+
 	r.GET("/ping", func(c *gin.Context) {
 		c.String(http.StatusOK, "pong "+fmt.Sprint(time.Now().Unix()))
 	})
+	r.GET("/ping2", func(c *gin.Context) {
+		c.String(http.StatusOK, "pong "+fmt.Sprint(time.Now().Unix()))
+	})
 	r.GET("/stream", func(c *gin.Context) {
 		c.Header("Content-Type", "text/event-stream")
 		c.Header("Connection", "keep-alive")