Check for config file

src/freedombone-app-tahoelafs

 function create_tahoelafs_introducer {
     introducer_dir="$1"
 
-    if [ -d ${introducer_dir} ]; then
+    if [ -f ${introducer_dir}/tahoe.cfg ]; then
         return
     fi
 
         return
     fi
 
-    if [ -d ${node_dir} ]; then
+    if [ -f ${node_dir}/tahoe.cfg ]; then
         return
     fi
 
         return
     fi
 
-    if [ -d ${client_dir} ]; then
+    if [ -f ${client_dir}/tahoe.cfg ]; then
         return
     fi
 
     create_tahoelafs_introducer /home/tahoelafs/introducer
     TAHOELAFS_INTRODUCER_CONFIG=/home/tahoelafs/introducer/tahoe.cfg
     if [ ! -f $TAHOELAFS_INTRODUCER_CONFIG ]; then
+        echo $'Unable to create introducer'
         exit 62831
     fi
 
     create_tahoelafs_storage_node /home/tahoelafs/storage "$(get_tahoelafs_introducer)"
     TAHOELAFS_STORAGE_CONFIG=/home/tahoelafs/storage/tahoe.cfg
     if [ ! -f $TAHOELAFS_STORAGE_CONFIG ]; then
+        echo $'Unable to create storage node'
         exit 782523
     fi
 
     TAHOELAFS_INTRODUCER=/home/tahoelafs/introducer/tahoe-introducer.tac
     if [ ! -f $TAHOELAFS_INTRODUCER ]; then
         echo $'Introducer file not found'
-        exit 782253
+        exit 9654845
     fi
 
     # start the storage node