Python scripts for deploying Earth Engine Apps to heroku, try it out: https://geemap-demo.herokuapp.com/

• Sign up for a free heroku account.
• Follow the instructions to install Git and Heroku Command Line Interface (CLI).
• Authenticate heroku using the heroku login command.
• Clone this repository: https://github.com/giswqs/geemap-heroku
• Create your own Earth Engine notebook and put it under the notebooks directory.
• Add Python dependencies in the requirements.txt file if needed.
• Edit the Procfile file by replacing notebooks/geemap.ipynb with the path to your own notebook.
• Commit changes to the repository by using git add . && git commit -am "message".
• Create a heroku app: heroku create
• Run the config_vars.py script to extract Earth Engine token from your computer and set it as an environment variable on heroku: python config_vars.py
• Deploy your code to heroku: git push heroku master
• Open your heroku app: heroku open

• To specify a name for your app, use heroku apps:create example
• To preview your app locally, use heroku local web
• To hide code cells from your app, you can edit the Procfile file and set --strip_sources=True
• To periodically check for idle kernels, you can edit the Procfile file and set --MappingKernelManager.cull_interval=60 --MappingKernelManager.cull_idle_timeout=120
• To view information about your running app, use heroku logs --tail
• To set an environment variable on heroku, use heroku config:set NAME=VALUE
• To view environment variables for your app, use heroku config

The instructions above on how to deploy a voila application on heroku are adapted from voila-dashboards/voila-heroku.