Almost there

server.go

@@ -52,7 +52,7 @@ func sendData(w http.ResponseWriter, r *http.Request) {
 		}
 		dateSince = newDateSince
 	}
-	records, err := getSnapshotRecordsFromDb(dateSince)
+	records, err := getSnapshotRecordsFromDb(dateSince.String())
 	if internalErrorOnErr(fmt.Errorf("couldn't get snapshots from db: %w", err), w, r) { return }
 	json, err := createJsonFromSnapshotRecords(records)
 	if internalErrorOnErr(fmt.Errorf("couldn't create json from snapshots: %w", err), w, r) { return }