The AskSensors Tech team has not published yet a ready-to-use example for the DS18b20 and AskSensors, but I believe they will do soon.
However, connecting the DS18b20 to AskSensors should not be difficult, you need two main steps:
STEP1: First, Connect your DS18b20 to the ESP8266, verify the temperature read from your sensor. Here is an example: https://www.hackster.io/adachsoft_com/e ... ver-5509ac
STEP2: Integrate your sensor reading to the AskSensors HTTP project: https://github.com/asksensors/AskSensor ... tp_get.ino
Hope it helps.