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First create a CNAME to your app using your DNS manager (e.g. AWS Route53, GoDaddy, etc.):
∫ host api-hub.yourappmydomain.iocom
# => api-hub.yourappmydomain.iocom is an alias ( CNAME ) for enhanced-tuna- 1 .apps.yourapp.io.my-nex-domain.com
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nex-cli domains:create api-hub.mydomain.com $app
nex-cli certs:create api-hub.mydomain.com $app --cert path-to-the-cert.crt --bundle path-to-the-bundle.crt --privkey .path-to-the-private.key.pem
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