Dockerize deployment

# Summary

It should be possible to Dockerize the deployment to make it simpler for custom faucets. This would require some changes on the `wrangler.toml` given the need to parameterize some of the hard-coded values. One could either use environment variables, e.g., for account id and routes or provide it via command-line arguments. Some things might require to create the wrangler file from a template (the need to remove the `[durable_objects]`) section in case of free accounts. Perhaps there's a better way.

# Completion Criteria

- [ ] Deployment is Dockerized
- [ ] The image doesn't contain any sensitive or private information, such as account id or wallet - it must be provided via environment variables.
- [ ] Docker image is used to deploy the service in the CD

# Additional Links & Resources