Add content for "Docker for NodeJS" about get-involved HOT 4 OPEN

@jmaitrehenry @Siddhant-K-code Please look at the structure of GoLang https://docker.github.io/get-involved/docs/communityleaders/eventhandbooks/go/ and then try to see if you can put it in the similar manner

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@ajeetraina do you have an idea of content for nodes developper?
Do you want to focus on nodejs backend application or you want to cover the case of frontend application that need nodes to generate a dist that could be serve with nains only (and cover multistage build)

I have some node and frontend example and could help on that.

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@jmaitrehenry Let me know if you have further queries

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I can work on this.

Like creating a simple backend service using express.js for creating a small server.

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