Added route to get Article by ID

cmd/main.go

@@ -21,6 +21,7 @@ func initGin() {
 	r.GET("/ping", internal.Ping)
 
 	r.GET("/get-all-articles", internal.AuthCheck, internal.GetAllArticles)
+	r.GET("/articles/:id", internal.AuthCheck, internal.GetArticle)
 	r.POST("/add-article", internal.AuthCheck, internal.AddArticle)
 	r.DELETE("/delete-article", internal.AuthCheck, internal.DeleteArticle)