code: func List(c *gin.Context) {
  	db := c.MustGet("db").(*mgo.Database)
  	articles := []models.Article{}
  	err := db.C(models.CollectionArticle).Find(nil).Sort("-updated_on").All(&articles)
  	if err != nil {
  		c.Error(err)
  	}
  	c.HTML(http.StatusOK, "articles/list", gin.H{
  		"title":    "Articles",
  		"articles": articles,
  	})
  }
docs: // List all articles