Add Dockerfile for deploy this service

[batazor]

Is your feature request related to a problem? Please describe.
It would be cool to have an example of a good Dockerfile to deploy this blog on your machine

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[timlrx]

You should refer to next.js site for how to deploy on docker. Don't feel a need to add it since it's pretty much the same.

[eshut]

@timlrx Then how to add this to compose? Missing dockerfile is a huge issue here, from my perspective