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×Looks like you need to setup a server with NodeJS and MongoDB - and then you can add MERN.
Do you need help with setting up those, then have a look at these tutorials:
https://www.digitalocean.com/community/tutorials/how-to-set-up-a-node-js-application-for-production-on-ubuntu-16-04
https://www.digitalocean.com/community/tutorials/how-to-install-mongodb-on-ubuntu-16-04
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