Implement basic routing

http/dashboard.go

@@ -18,7 +18,7 @@ func (h *Handler) dashboard(c *gin.Context) {
 	d := DashboardData{
 		Budgets: budgets,
 	}
-	c.HTML(http.StatusOK, "dashboard.html", d)
+	c.JSON(http.StatusOK, d)
 }
 
 type DashboardData struct {