Configuration settings are injected via environment variables into both builds and running container(s) alike. This allows you to follow 12-factor principles while running and developing applications.
runway app config lsrunway app config setrunway app config rmConfiguration changes are not applied to the running app directly.
After runway config set/rm, run runway app restart to restart the latest app build
with the new config values.
Alternatively, do another runway app deploy, for a complete re-build and
deployment.