Maybe you can try https://flows.network/ https://flows.network/, which supports environment variables when creating an app. You can also manage the environment

Maybe you can try https://flows.network/ https://flows.network/, which supports environment variables when creating an app. You can also manage the environment variables later with their UI. Click on https://flows.network/flow/createByTemplate/Telegram-ChatGPT https://flows.network/flow/createByTemplate/Telegram-ChatGPT, you can see you could set up system_prompt.