1. Deploying Node-RED into Heroku

2. Set Username and Password for your Flow Editor

NODE_RED_a_USERNAME - Create a user name and password.
NODE_RED_b_PASSWORD -

3. Export all flows as "flows.json" file AFTER you create your flow and deploy it

In Editor, click hamburger icon (top right), click Export, choose tab "all flows", then Download.

4. Fork this repo, Set your github as deploy source on Heroku setting, and enable Automatic Deployment

Push downloaded "flows.json" file to your repo on github.
Every time "flows.json" pushed to your repo, Heroku will rebuild node-red with updated "flows.json".
So your node-red will always have latest pushed "flows.json" when Heroku restarted.