How to I make a rails app run just on a subdomain? -


i run multiple rails apps on 1 domain name.

ex: app1.expample.com , app2.example.com

right have root routes pointing 

root 'pages#home' "/" => "pages#home"

how change run on subdomain root?

since said "multiple rails apps" assuming not mean multi-tenant app acts multiple subdomains.

this have more dns , webserver configuration app configuration. want install different apps virtual host configurations in apache, nginx etc. if using heroku easy have manage dns.

i running multiple docker containers behind nginx reverse proxy routes virtual hosts apps serving different ports on docker host involve bit more setup.


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