It seems to me that Ansible is best for deploying servers, and containers are best for deploying applications. You can absolutely use Ansible to deploy applica

It seems to me that Ansible is best for deploying servers, and containers are best for deploying applications. You can absolutely use Ansible to deploy applications, but, if there is any essential complexity in your run-time environment or configuration needs, it seems that Ansible has a tendency to make that complexity compound multiplicatively instead of additively. Disclaimer: I say this, not as an ops person, but as a developer who often uses containers and occasionally watches people wrestling with Ansible from the sidelines.