Attempt yarn fix

src/freedombone-app-peertube

@@ -656,6 +656,8 @@ apt-get -yq install yarn
 #    echo $'PeerTube failed to install webpack'
 #    exit 68386353
 #fi
+yarn install
+yarn run build:prod
 yarn add -D webpack
 if [ ! "\$?" = "0" ]; then
     echo $'PeerTube failed to add webpack'