add target for portable version #3397
add target for portable version #3397

ok, zips the electron app but now missing --portable :(  FIXED

ScottPJones/beaker-notebook,vital-ai/beaker-notebook,vital-ai/beaker-notebook,ScottPJones/beaker-notebook,ScottPJones/beaker-notebook,vital-ai/beaker-notebook,vital-ai/beaker-notebook,ScottPJones/beaker-notebook,vital-ai/beaker-notebook,ScottPJones/beaker-notebook,vital-ai/beaker-notebook,vital-ai/beaker-notebook