Consolidate starter channels and define default promotion channels

app/models/onboarding_scenarios/base.rb

@@ -48,7 +48,7 @@ def slack_user_type = :multi_channel_guest
     def slack_channels = []
 
     # Returns array of channel names/IDs to add when promoting guest to full member
-    def promotion_channels = []
+    def promotion_channels = chans(:announcements, :lounge, :help, :news_wire, :slack_guide)
 
     # Returns :internal_tutorial or :external_program
     # Defaults to :internal_tutorial so every scenario gets the Flaming Skull welcome

app/models/onboarding_scenarios/default_join.rb

@@ -23,7 +23,7 @@ def slack_channels
           channels
         end
 
-        def promotion_channels = Rails.configuration.slack_channels.slice(:announcements, :happenings, :community, :hardware, :code, :ship, :neighbourhood, :library, :lounge, :help).values
+        def promotion_channels = Rails.configuration.slack_channels.slice(:announcements, :lounge, :help, :news_wire, :slack_guide).values
 
         def send_ephemeral_in_channel? = true
 

app/models/onboarding_scenarios/slack_join.rb

@@ -24,7 +24,7 @@ def slack_channels
       channels
     end
 
-    def promotion_channels = Rails.configuration.slack_channels.slice(:announcements, :happenings, :community, :hardware, :code, :ship, :neighbourhood, :library, :lounge, :help).values
+    def promotion_channels = Rails.configuration.slack_channels.slice(:announcements, :lounge, :help, :news_wire, :slack_guide).values
 
     def send_ephemeral_in_channel? = true
 

config/slack_channels.yml

@@ -84,4 +84,5 @@ shared:
   hackatime_help: C0AFG0XGGMP
   ysws: C0710J7F4U9
   leaders: C02PA5G01ND
-  leaders_bulletin: C0AQ1CG4JLD
+  leaders_bulletin: C0AQ1CG4JLD
+  news_wire: C0BJ6LTLAFJ