Switching paths

src/freedombone-app-peertube

         echo $'Failed to install local npm version 5.6.0'
         exit 45465774
     fi
+    PREV_PATH=$PATH
     PATH=$(npm bin):$PATH
     npm install node@9.5.0
     if [ ! "$?" = "0" ]; then
+        PATH=$PREV_PATH
         echo $'Failed to install local nodejs version 9.5.0'
         exit 54875459
     fi
+    PATH=$PREV_PATH
     npm install npm@5.6.0
     if [ ! "$?" = "0" ]; then
         echo $'Failed to install local npm version 5.6.0'
         echo $'Failed to install yarn'
         exit 578947946
     fi
+    PATH=$(npm bin):$PATH
     yarn add -D webpack --network-concurrency 1
     #yarn install --non-interactive
     #if [ ! "$?" = "0" ]; then
     #fi
     npm install
     if [ ! "$?" = "0" ]; then
+        PATH=$PREV_PATH
         echo $'Failed to install peertube'
         exit 7835243
     fi
     npm run build
     if [ ! "$?" = "0" ]; then
+        PATH=$PREV_PATH
         echo $'Failed to build peertube'
         exit 5293593
     fi
+    PATH=$PREV_PATH
 
     PEERTUBE_ONION_HOSTNAME=$(add_onion_service peertube 80 ${PEERTUBE_ONION_PORT})