Differentiation between requests send from next server and from the browser

[fabiocarneiro]

Feature request

Is your feature request related to a problem? Please describe.

When running the application in docker, it's common to access the container using their names, either by having them on the same network or using the link option.

For the requests that don't go through SSR, the value of the environment variable defined with publicRuntimeConfig will also be used even when requests don't go through Nodejs. Not always the value defined there (for example, a backend URL) will be accessible from the host.

Describe the solution you'd like

I would like to split the publicRuntimeConfig configuration option (or introduce a new) that allows different values to be configured, depending on if the request is going to be sent from the browser or from the next server for SSR.

Describe alternatives you've considered

• Use docker inspect on the container and pass as environment variable the IP, which is the same either from inside another container or from the host.
• Add an alias to my container name on my /etc/hosts file