【備忘録】Firebaseでデーモン

Firebase Hosting can't run any code. Cloud Functions can run code, but not indefinitely, and only in response to defined triggers.

Consider instead using multiple IFTTT with a Cloud Function as a webhook to receive tweets that meet some search criteria, as implemented in this project. You can set up multiple IFTTT applets if you need multiple queries to be aggregated in one place. This may be your best bet if you don't want to maintain your own server.

https://stackoverflow.com/questions/48513767/running-a-node-js-background-process-for-twitter-streaming-api-in-firebase
https://gist.github.com/CodingDoug/d61cbe63b3a2f90799d9651451adfcfa