feat: add ping controller for check by gateway

.env.example

@@ -6,3 +6,5 @@ THREADS_MAX_COUNT=50
 POSTGRES_URL=postgres://localhost/micrach?pool_max_conns=5
 THREAD_BUMP_LIMIT=500
 IS_CAPTCHA_ACTIVE=true
+GATEWAY_URL=http://localhost:3001
+GATEWAY_API_KEY=example

controllers/gateway_controller.go

@@ -0,0 +1,18 @@
+package controllers
+
+import (
+	Config "micrach/config"
+
+	"github.com/gin-gonic/gin"
+)
+
+func Ping(c *gin.Context) {
+	headerKey := c.Request.Header.Get("Authorization")
+	if Config.App.Gateway.ApiKey != headerKey {
+		c.AbortWithStatusJSON(401, gin.H{"error": "Unauthorized"})
+		return
+	}
+	c.JSON(200, gin.H{
+		"message": "pong",
+	})
+}

main.go

@@ -67,6 +67,9 @@ func main() {
 	}
 	router.Static("/uploads", "./uploads")
 	router.Static("/static", "./static")
+	if Config.App.Gateway.Url != "" {
+		router.GET("/ping", Controllers.Ping)
+	}
 	router.GET("/", Controllers.GetThreads)
 	router.POST("/", Controllers.CreateThread)
 	router.GET("/:threadID", Controllers.GetThread)