Feature: Implement and document npm setup

[jeppekroghitk]

Link to ticket

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Description

Implement npm setup in taskfile and document how to build assets.

Screenshot of the result

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Checklist

• My code is covered by test cases.
• My code passes our test (all our tests).
• My code passes our static analysis suite.
• My code passes our continuous integration process.

If your code does not pass all the requirements on the checklist you have to add a comment explaining why this change
should be exempt from the list.

Additional comments or questions

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[turegjorup]

Please document how to build assets for production