Not possible to build firebase app when serving emulators
build target attempts to clean the functions app dist folder before building but access will be denied if the emulators are running as they have a watch on the dist assets
One workaround for this that's working for me is to build with --deleteOutputPath=false
This allows us to keep the emulators running in the background and do incremental builds.
Should either document this or incorporate it more deeply etc.
Gah. deleteOutputPath isn't a feature of the @nrwl/js:tsc executor which I'm using in the latest plugin version.
And the equivalent clean option only makes an appearance in Nx 14.5.x
Linking to #95