Telegram messenger: Download the app to the phone or desktop as well.
Search the BotFather, the official bot that allows you to create bots.
Then, create a new bot:
/newbot
Choose a name for your bot
FindomainBot
Choose a username for your bot, which must end with "_bot"
FindomainWebhook_bot
Once the bot is created, you will have a long string that is the TOKENID. The message will be similar to:
Use this token to access the HTTP API:
It will be used as the findomain_telegrambot_token system variable, save it.
Now, the bot is only the "guy" who will send you the messages. It has to know the chat where to send them. For this reason, got to the search bar of Telegram, and search your bot. Then, start the bot:
/start
You can now go to the website https://api.telegram.org/bot[BOT_TOKEN]/getUpdates (replacing [BOT_TOKEN] with the token you received before) and search for your id.
It will be used as the findomain_telegrambot_chat_id system variable, save it.
Now you are ready to use the Telegram webhook.