build: create dev-app deploy output in separate directory (#14373)
build: create dev-app deploy output in separate directory (#14373)

* This fixes that `serve:devapp` does not work after building the deploy output of the `dev-app` (e.g. when deploying to firebase)
DevVersion/material2,crisbeto/material2,Jefiozie/material2,mmalerba/material2,josephperrott/material2,DevVersion/material2,Jefiozie/material2,andrewseguin/material2,angular/components,angular/components,jelbourn/material2,josephperrott/material2,andrewseguin/material2,josephperrott/material2,jelbourn/material2,jelbourn/material2,mmalerba/material2,angular/components,jelbourn/material2,mmalerba/material2,crisbeto/material2,jelbourn/material2,crisbeto/material2,angular/components,mmalerba/material2,andrewseguin/material2,DevVersion/material2,andrewseguin/material2,josephperrott/material2,Jefiozie/material2,josephperrott/material2,andrewseguin/material2,Jefiozie/material2,Jefiozie/material2,mmalerba/material2,crisbeto/material2,DevVersion/material2,DevVersion/material2