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When does it make sense to run Node on docker vs Heroku dynos or something similar? Is it just a cost thing at a certain number? Are these significantly specialized containers? The types mentioned in the doc seem like basic web apps.

I've used Docker for things like complicated java dev environments. But it seems over-applied for basic web apps.

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> But it seems over-applied for basic web apps.

Generally your app will be composed of multiple services (like Java, Node.js, some database etc) and there are benefits to run them as microservices (isolation, easy to develop, easy to scale) and hence Docker makes sense in those use cases. Though the app seems basic and overkill to use Docker, the architecture enforces this and adds the above mentioned benefits.

I had the impression Heroku is generally more expensive.

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