You might be best served by some platform-as-a-service (Heroku, platform.sh, Netlify, ...) than by a cluster offering.
PaaS are pretty much turnkey for many apps, and cost mostly scales with the actual usage which tends to fit well small companies.
They completely hide infra management from you, deployment can be entirely automated through Git with no SSH or Docker registry management, and they provide access to what you listed: config/secrets, logs.