add readme and fix save

front/src/pages/maps/index.astro

@@ -204,9 +204,9 @@ console.log(fav);
             .bindPopup(`<b>${prop.name}</b><br/>note : ${prop.rate} <br/>tags:<br/> ${tags} <p>favori : <input type="checkbox" name="like" id=${element.id}/><p>`)
             .on("click", () => {
               document.querySelectorAll<HTMLInputElement>('input[name="like"]').forEach(e => {
-                e.addEventListener("click", () => {
+                e.addEventListener("click", async () => {
                   console.log(element)
-                  saveToFav(element, e.checked)
+                  await saveToFav(element, e.checked)
                   document.location.reload()
                 })
               })