You could either install node.js into your box ( if possible ) and accommodate NodeBB into it. Or, get a new VPS, install NodeBB on it with meeting server requirements. Link it to your choice of sub domain.
NodeBB open source project stats
Looking at the NodeBB data on Open Hub (stats on open source projects), it seems a reliable project with continuing daily work. Congrats on that.
By the way, NodeBB is nearing the 100,000 lines of code soon:
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