add postgres dev package for bundle install

modules/rails_api/manifests/init.pp

@@ -5,7 +5,7 @@
 class rails_api {
 class rails_api {
   require nilmdb
   require nilmdb
 
 
-  $deps = ['ruby-dev','libsqlite3-dev','nodejs']
+  $deps = ['ruby-dev','libsqlite3-dev','nodejs', 'libpq-dev']
   package {$deps:,
   package {$deps:,
     ensure => present
     ensure => present
   }
   }